Makes 4 servings My Grandfather's Greek Fish Recipe Type: Entree Ingredients Olive oil spray 1 large onion, sliced 2 large tomatoes, sliced 1 large bunch parsley, coarsely chopped 4 (4 to 6 ounce) boneless mild fish fillets (See Notes) 1 lemon, halved Instructions Preheat oven to 350° F. Lightly coat a 9 x 13-inch casserole