Heat olive oil over medium-high heat in a large skillet; add Mama Mia Marinara Sauce Mix, zucchini and summer squash. Saute for 2-3 minutes or until vegetables are crisp-tender; stir in tomatoes. Heat through; remove vegetables, keeping all the liquid in the pan. Cook fish in hot skillet, turning once until fish flakes easily, about 5 minutes. Add vegetables back into the skillet; heat through. Serve fish and vegetables with hot pasta; garnish with Parmesan cheese. Makes 6 servings.