Preheat oven to 350°F. In ... sliced and seeded squash and zucchini with onion and 10 cups ... on top of casserole and pour melted butter over ... Serves 6 to 8.
Combine sauteed onion with squash; combine 1/2 cup grated ... into large, greased casserole dish. Sprinkle 1/2 cup croutons ... minutes at 350 degrees.