Saute squash in butter for 3 minutes in a saucepan. Add bell pepper, zucchini, corn and tomatoes with all seasonings and saute 2 to 3 minutes longer. Transfer the mix to a deep oiled casserole dish and covere with grated cheese. Bake at 350 degrees for 25 to 30 minutes. Makes 3 main dish servings or 6 side dishes.