Preheat oven to 400°F.
Place the olives, sundried tomatoes, capers, garlic, basil, lemon juice and olive oil in the bowl of a food processor. Process until finely ground but not completely smooth (add more olive oil if needed).
Place the fish filets in a baking dish sprayed or brushed with olive oil and season them with a small amount of salt and pepper. Spoon about 2 tablespoons of the olive and sundried tomato spread on top of each piece of fish, spreading it out over the surface. Cover and refrigerate the remaining spread.
Bake until fish is cooked through, about 10-15 minutes depending on the size and thickness of the filet.