Combine sauteed onion with squash; combine 1/2 cup grated carrot, 1 cup sour cream, ... into large, greased casserole dish. Sprinkle 1/2 cup croutons ... minutes at 350 degrees.
Cook squash and onions 5 minutes and ... cream. Stir in carrots, squash and onions. Mix ... on bottom of casserole dish. Add remaining squash mixture ... as a main dish.