1 cup Parmesan cheese
1 stick butter, melted
1/2 cup onion
1 tsp. garlic powder or 1 clove garlic
1/4 cup Bisquick
1/2 tsp. oregano
3 yellow squash or zucchini
1 tube Ritz crackers (crushed)
1 more stick of butter, melted

Mix all together well. Make sure all squash are coated well with the mix. Bake 30 minutes in a preheated 350° oven. Once casserole is done, combine cracker crumbs with melted butter and top casserole with them. Return to oven a few minutes until crumbs are golden brown.