Toast English muffins. Place muffins on foil-lined cookie sheet and spread sauce on top (not too much or they will mush up). Add any mixture of vegetables you are using. Sprinkle with 1/4 tsp. Parmesan. If using, add 1/4 - 1/2 tsp. ricotta and top with mozzarella. Bake at 350 about 4 minutes and then broil to get cheese bubbly. Enjoy with a healthy salad of lettuce, carrots, and cucumbers with homemade balsamic dressing. Allow at least 4 halves per person.