Name: Olive-Citrus Slow Roasted Salmon Recipe
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Mediterranean
Ingredients: 1 (1 1/2-lb.) skin-on salmon fillet; 2 navel oranges, divided; 1 lemon; 1/4 cup + 2 Tbsp. extra-virgin olive oil, divided; 1 tsp. kosher salt, divided; 1/4 tsp. cracked black pepper; 1/2 cup coarsely chopped Castelvetrano olives; 2 Tbsp. minced shallots or red onion; 1/4 cup finely chopped fresh parsley; 3 Tbsp. finely chopped fresh dill; 1 tsp. Aleppo pepper flakes (or 1/4-1/2 tsp. crushed red pepper flakes)

Jump to Recipe· 4.3 from 81 reviews

If you've been searching for a recipe that truly elevates salmon to restaurant-quality flavor with minimal fuss, then you will absolutely love this Olive-Citrus Slow Roasted Salmon Recipe. It combines the gentle, buttery texture of slow-roasted salmon with bright bursts of citrus and the briny punch of Castelvetrano olives, resulting in a dish that’s both vibrant and deeply satisfying. The magic happens as the fish gently roasts atop fragrant slices of orange and lemon, soaking in all those fresh, zesty flavors, while the finishing drizzle of herbaceous olive and citrus mixture sends each bite over the top. It’s a dinner that feels special without demanding hours in the kitchen, perfect for sharing with family or impressing friends.

Ingredients You'll Need

The image shows fresh ingredients on a white marbled surface, centered by a thick, raw salmon fillet with a smooth, orange-pink texture and white lines running through it in a diagonal pattern. Around the salmon, there are small clear glass bowls with sliced shallots in light pink and white, chopped green olives, fresh green parsley leaves, and arugula. Three whole, bright orange oranges are arranged above the salmon. There are also small bowls of red spice powder, black pepper, and greenish-brown spice, plus a small bowl of white salt. A clear glass measuring cup with golden olive oil sits near the top left, all ingredients spaced neatly apart. Photo taken with an iphone --ar 4:5 --v 7

One of the best things about the Olive-Citrus Slow Roasted Salmon Recipe is how it brings together a handful of fresh, simple ingredients that each add a unique splash of flavor, texture, and color. From the fruity richness of extra-virgin olive oil to the fresh herbs that brighten the dish, every component plays a vital role.

2 navel oranges, divided: One for roasting under the salmon for gentle citrus infusion, and the other for zest and juice to brighten the topping.

1 lemon: Thin slices serve as a fragrant bed for the salmon to roast on, adding subtle acidity.
1 (1 ½-lb.) skin-on salmon fillet: The star of the dish, perfect for slow roasting to keep it tender and moist.
¼ cup + 2 Tbsp. extra-virgin olive oil, divided: Adds richness and helps meld the citrus and olive flavors beautifully.

1 tsp. kosher salt, divided: Enhances every other ingredient’s natural flavors without overpowering.
¼ tsp. cracked black pepper: Gives a gentle kick that balances the citrus tang.
½ cup coarsely chopped Castelvetrano olives: Their mild, buttery, and slightly salty taste complements the citrus and fish perfectly.

2 Tbsp. minced shallots or red onion: Adds a subtle sweet sharpness to the topping.
¼ cup finely chopped fresh parsley: Brings a fresh, green brightness to lighten the dish.
3 Tbsp. finely chopped fresh dill: Offers classic herbal notes beloved with salmon dishes.

1 tsp. Aleppo pepper flakes (or ¼-½ tsp. crushed red pepper flakes): A mild heat with fruity undertones adds complexity without overt spiciness.

How to Make Olive-Citrus Slow Roasted Salmon Recipe

Step 1: Prep the Oven and Citrus

First things first, preheat your oven to 300ºF. This lower roasting temperature is key to cooking the salmon gently, keeping it moist and tender. While the oven comes up to heat, slice one of the navel oranges and the lemon into thin, delicate rounds. These will create a fragrant citrus bed for the salmon to rest on, infusing the fish with subtle citrus notes as it cooks. Arrange these slices evenly in a large baking dish for a pretty, aromatic foundation.

Step 2: Season and Roast the Salmon

Place your beautiful salmon fillet, skin side down, atop the citrus slices. Drizzle 2 tablespoons of the extra-virgin olive oil over the top, then sprinkle with ¾ teaspoon kosher salt and ¼ teaspoon cracked black pepper. These simple seasonings allow the salmon’s natural flavors to shine while enhancing the citrus aroma below. Slide the dish into your preheated oven and roast for about 25 to 30 minutes. You’ll know it’s ready when the salmon turns opaque around the edges and flakes easily with a fork — slow roasting ensures it doesn’t dry out and stays silky smooth throughout.

Step 3: Prepare the Olive-Citrus Topping

While the salmon is roasting, mix together the star topping that makes this recipe truly shine. In a medium bowl, combine the coarsely chopped Castelvetrano olives, minced shallots (or red onion if you prefer), and Aleppo pepper flakes for a touch of mild heat. Zest and juice the remaining navel orange — aim for about 2 teaspoons of zest and 3 tablespoons of juice — then add these along with the remaining ¼ cup olive oil. Stir everything together to marry the flavors. Finish by folding in the fresh parsley and dill, and season with the remaining ¼ teaspoon kosher salt. This vibrant mixture adds a fresh, savory, and slightly spicy contrast that will beautifully complement the rich salmon.

Step 4: Finish and Serve

When your salmon comes out of the oven, spoon the olive-citrus mixture generously over the warm fillet. The warm fish gently melds with the bright topping, creating a combination of luscious textures and fresh zing with every bite. Get ready to enjoy a dish that looks stunning on the plate and bursts with harmonious flavors.

How to Serve Olive-Citrus Slow Roasted Salmon Recipe

In a white rectangular baking dish, there is a thick piece of pink-orange cooked salmon placed on top of a layer of bright yellow and light orange slices of lemon and orange arranged flat. The salmon is topped with a chunky green herb and olive mixture, including finely chopped herbs and green olives scattered evenly across the surface. The dish is surrounded by a yellow oily sauce with red pepper flakes sprinkled over the salmon and sauce, creating small red specks. The white marbled surface can be seen around the dish, and part of a small white bowl with green olives is visible in the corner. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To really elevate your serving, consider garnishing with a few sprigs of fresh dill or parsley for a pop of color and herbal aroma. Thin slices of fresh orange or lemon around the plate can echo the citrusy theme beautifully and add visual appeal. A light drizzle of extra virgin olive oil just before serving will add luscious shine and a silky finish.

Side Dishes

The gentle citrus and olive flavors from this dish pair wonderfully with simple, comforting sides. Fluffy rice or buttery roasted potatoes absorb and complement the sauce perfectly. Alternatively, warm pita bread on the side gives a Middle Eastern flair, perfect for scooping up the topping and juices. Steamed seasonal vegetables or a crisp green salad with a lemon vinaigrette would also be bright, fresh companions to balance the richness of the salmon.

Creative Ways to Present

If you want to impress your guests visually, try plating the salmon on a large wooden serving board on top of whole citrus slices, and spooning the olive-citrus mixture over the top in a rustic style. Alternatively, serving individual portions on vibrant plates with a drizzle of the citrus-olive dressing around the edges makes the whole dish pop. For an informal gathering, consider building mini open-faced sandwiches using warm pita, salmon slices, and the topping for a shareable delight.

Make Ahead and Storage

Storing Leftovers

Any leftovers of the Olive-Citrus Slow Roasted Salmon Recipe should be stored in an airtight container in the refrigerator. To keep the salmon moist, try to separate it from the topping until you’re ready to serve again. It will keep well for up to 2 days, though it’s best enjoyed as fresh as possible for texture and flavor.

Freezing

While it’s always ideal to enjoy salmon freshly roasted, you can freeze leftover cooked salmon by wrapping it tightly in plastic wrap and then placing it in a freezer-safe container or bag. Freezing is best done without the olive-citrus topping, which doesn't freeze well. The salmon can be frozen for up to 1 month. When ready to enjoy, thaw slowly in the refrigerator overnight.

Reheating

Reheat your salmon gently in a low oven (around 275ºF) covered with foil to prevent drying out, just until warmed through. It’s best to add back the olive-citrus topping fresh after reheating to retain its bright, fresh flavor and texture. Microwave reheating is possible but be cautious to avoid overcooking.

FAQs

Can I use other types of fish for this recipe?

Absolutely! While this recipe is designed for salmon’s rich texture, other firm, oily fish like trout or Arctic char could also work well with the olive-citrus topping and slow roasting method.

What if I don’t have Aleppo pepper flakes?

No problem! You can substitute with crushed red pepper flakes, using just a smaller amount to control the heat level. Aleppo pepper has a subtle fruity heat, so try to balance the spice accordingly.

Is it necessary to roast the salmon at a low temperature?

Yes, roasting at 300ºF allows the salmon to cook gently, keeping it tender and moist without drying it out. Higher temperatures cook fish faster but can risk toughening the texture.

Can this recipe be made gluten-free?

Definitely! The Olive-Citrus Slow Roasted Salmon Recipe is naturally gluten-free as long as you pair it with gluten-free sides. Just stick to rice, roasted veggies, or gluten-free bread if desired.

How do I know when the salmon is perfectly cooked?

The salmon is done when it turns opaque at the edges and flakes easily when gently prodded with a fork. The center should still be slightly translucent for the best texture — slow roasting helps achieve this gently.

Final Thoughts

I cannot recommend the Olive-Citrus Slow Roasted Salmon Recipe enough for anyone who cherishes bold, fresh flavors paired with tender, flaky fish. This dish brings together simple pantry staples in a way that feels both elegant and effortless — it’s truly one of those meals you’ll reach for again and again. So grab some oranges, fresh herbs, and your salmon fillet, and get ready to wow yourself and those you share it with. Happy cooking!

Olive-Citrus Slow Roasted Salmon Recipe

Ingredients You'll Need