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Olive-Citrus Slow Roasted Salmon Recipe

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4.1 from 76 reviews

This Olive-Citrus Slow Roasted Salmon is a flavorful and elegant dish featuring a tender, skin-on salmon fillet slow roasted with fresh citrus, Castelvetrano olives, aromatic herbs, and a hint of gentle heat from Aleppo pepper flakes. The combination of navel oranges, lemon, and herbs like dill and parsley imparts a bright, fresh, and savory profile that beautifully complements the richness of the salmon. Perfect for a healthy yet indulgent meal, this recipe offers an effortless way to impress with minimal hands-on time.

Ingredients

Salmon and Citrus

  • 2 navel oranges, divided
  • 1 lemon
  • 1 (1 1/2-lb.) skin-on salmon fillet

Seasonings and Oil

  • 1/4 cup + 2 Tbsp. extra-virgin olive oil, divided
  • 1 tsp. kosher salt, divided
  • 1/4 tsp. cracked black pepper

Herb and Olive Mixture

  • 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)

Instructions

  1. Prepare the citrus and salmon: Zest one orange and juice it along with the lemon. Thinly slice the remaining orange and set aside. Place the salmon on a roasting pan lined with parchment or foil, skin-side down. Pat dry and season with half the kosher salt and black pepper.
  2. Mix the olive-citrus herb topping: In a bowl, combine the Castelvetrano olives, minced shallots, parsley, dill, Aleppo pepper flakes, orange zest, and the juice of the orange and lemon. Add 1/4 cup of olive oil and stir to create a chunky, fragrant topping.
  3. Top the salmon: Spread the olive-citrus herb mixture evenly over the top of the salmon fillet. Arrange the thin orange slices decoratively on top to infuse additional citrus aroma and visual appeal.
  4. Add the finishing touches: Drizzle the remaining 2 tablespoons of olive oil over the salmon and orange slices. Sprinkle the remaining kosher salt over everything for enhanced flavor.
  5. Slow roast the salmon: Preheat your oven to 275°F (135°C). Roast the salmon gently on the middle rack for about 25-30 minutes, or until the salmon is just cooked through and flakes easily with a fork. The low temperature ensures a tender, moist texture.
  6. Serve: Remove the salmon from the oven and let it rest for a couple of minutes. Serve hot, garnished with additional fresh herbs if desired, alongside your favorite sides such as roasted vegetables or a fresh salad for a balanced meal.

Notes

  • Using Castelvetrano olives gives a mild, buttery flavor that complements the citrus beautifully; if unavailable, green olives can be substituted but expect a saltier taste.
  • Slow roasting at a low temperature helps maintain the salmon’s moisture and creates a tender texture.
  • Aleppo pepper flakes add a subtle heat and complexity; adjust the quantity based on your heat preference.
  • Ensure the salmon is skin-on; the skin helps keep the fillet together during roasting and can be crisped if desired.
  • This dish pairs excellently with light sides such as quinoa, roasted asparagus, or a green salad.