3 average zucchini, sliced
1 stick butter
1/4 c. vinegar
2 lg. purple onions
1 pkg. Parmesan cheese

Fry sliced zucchini in butter. Remove. Add vinegar to butter drippings, then fry onions until tender. Put zucchini in a baking dish. Pour vinegar and butter mixture over zucchini. Top with Parmesan cheese and bake in preheated oven for 10 minutes.