- 3 large yellow summer squash – peeled, seeded, and sliced into 1/2 inch rounds
- 1/2 medium onion, cut into 1/2-inch slices
- 2 tablespoons butter
- 4 slices Swiss cheese
- salt and pepper to taste
- Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 2 quart casserole dish.
- Layer the squash and onions in the casserole dish. Dot with butter, and top with Swiss cheese slices.
- Cover, and bake 15 minutes in the preheated oven. Remove cover, and continue baking 15 minutes, or until squash is tender.