Step 1

Preheat the oven to 300°. Place the fish into a baking dish, cutting the fillet in half if needed. Season with salt and pepper; then, pour the olive oil over the fish, ensuring it is well coated. Add 2 of the garlic cloves and thyme to the baking dish.

Step 2

Roast for 25-30 minutes, or until the fish is cooked through and flakes easily. Discard the thyme and garlic cloves.

Step 3

While the fish is roasting, finely chop the herbs, olives, walnuts, and remaining garlic clove together. (Note: you can use a food processor for this, but I like the texture of hand chopping for this recipe!) Set aside in a small bowl.

Step 4

Add 1-2 tablespoons of the warm olive oil to the finely chopped herb, olive, walnut, and garlic, until it resembles a pesto sauce. Season with salt and pepper to taste.