Pat the cod filets dry using paper towels, then transfer them to a casserole dish, baking sheet, or baking dish. Coat the flesh with avocado oil and sprinkle it with sea salt.
Spread 1 to 2 tablespoons of pesto sauce over each of the filets. Sprinkle the remaining ingredients (capers, sun-dried tomatoes, kalamata olives, and feta cheese) over the filets.
Bake on the center rack of the preheated oven for 12 to 16 minutes, or until the fish is cooked through. cod is considered fully cooked when it has reached an internal temperature of 137 degrees Fahrenheit. To verify the temperature, insert an instant read thermometer into the thickest part of the filet and wait until the numbers stop increasing.
Serve Mediterranean Baked cod with your choice of side dishes and lemon wedges.
Notes
If your cod filets are frozen, thaw them completely before preparing this recipe.