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Baked halibut with tomato caper sauce on plates.
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5 from 1 vote

Baked Halibut with Tomato Caper Sauce

This baked halibut is cooked until tender and served with a tomato caper sauce. Prepare the sauce ahead of time for a quick and easy dinner!
Prep Time5 mins
Cook Time30 mins
Total Time35 mins
Course: Main Course
Cuisine: American
Diet: Gluten Free
Servings: 2 people
Calories: 292kcal


Tomato Caper Sauce:

  • 1 tablespoon olive oil
  • 1 onion, diced
  • 2 garlic cloves, finely diced
  • 1 tablespoon capers or use diced Kalamata olives
  • 14 ounce can diced tomatoes or 1 lb fresh tomatoes, cored + diced
  • ½ teaspoon fresh thyme, removed from stems ¼ tsp dried thyme


  • 1 tablespoon olive oil, divided
  • 8 ounces halibut (2 fillets) Or swap cod (or another dense white fish)
  • teaspoon sea salt
  • ¼ lemon (4 thin slices)


Tomato Caper Sauce:

  • Add oil to a heavy saucepan over medium heat. Add diced onions and cook 3-5 minutes, or until the onions are tender.
    Add garlic and capers. Cook 1-2 more minutes, or until garlic is fragrant.
    Cook Onions Until Tender
  • Add tomatoes, salt, and thyme. Lower heat to medium-low, and simmer for about 10 minutes or until the sauce is thickened. (If your tomatoes are especially juicy, they may take a few minutes longer to cook.)
    Cover sauce to keep warm.
    Optionally, prepare the sauce up to 3-4 days ahead of time, and rewarm before serving.
    Add Tomatoes + Simmer Until Thickened

Baked Halibut:

  • Preheat oven to 450°F.
    Brush an oven-safe pan with half the oil. Alternatively, use a baking sheet or casserole dish.
    Set the fish in the pan. Drizzle remaining oil over fish and sprinkle with salt. Cover the fish in lemon slices.
    Add Lingcod to Oven-Safe Pan
  • Cover pan with foil, and bake 8 minutes per 1" thickness. The fish is done when tender and easily pierced by a fork.
    Note that thinner fillets of fish will cook more quickly, so take care to note the thickness of the fillets.
    Bake Covered Until Tender
  • Serve the halibut right away along with the tomato caper sauce.
    Any extra sauce can be used to top side dishes (such as rice, pasta, or cauliflower rice).
    Baked halibut with tomato caper sauce on plates.


Calories: 292kcal | Carbohydrates: 16g | Protein: 24g | Fat: 16g | Saturated Fat: 2g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 11g | Cholesterol: 56mg | Sodium: 620mg | Potassium: 982mg | Fiber: 4g | Sugar: 7g | Vitamin A: 342IU | Vitamin C: 32mg | Calcium: 95mg | Iron: 3mg