Yellow Squash Casserole

2 cups cooked, drained, and mashed yellow summer squash
1/2 cup mayonnaise
1/2 cup chopped onion
1 large egg, beaten
1 tsp sugar
1/2 tsp salt
1/8 tsp pepper
1/4 cup melted butter, divided
3/4 cup shredded Cheddar cheese, divided
2 tbs butter, cut into small pieces
2 tbs melted butter
1/2 cup soft bread crumbs
salt and pepper

Butter a 1 to 1 1/2-quart casserole. Heat oven to 350°. In a bowl, blend mashed squash with mayonnaise, chopped onion, beaten egg, salt, pepper, 2 tbs of melted butter, and the 1/2 cup of the Cheddar cheese. Spoon the mixture into prepared casserole. Top the casserole with the remaining 1/4 cup of shredded cheese. Toss the bread crumbs with the remaining 2 tbs of melted butter; spread over the casserole. Bake for 30 minutes, or until bubbly and lightly browned.

Yields 4 servings