1 lg. zucchini, sliced (don't peel)
1 sm. onion, chopped
1/4 tsp. oregano, (or adjust to taste)
1 can cooked tomatoes
Parmesan cheese, grated

Saute' zucchini and onion in butter. Add spices and tomatoes. Sprinkle grated cheese over top. Cook until zucchini is tender and cheese is melted.