Summer Squash Casserole

Thanks to my friends over at www.allrecipies.com for this (any many more to come) recipe.
Ingredients

1 pound summer squash, sliced
1/4 cup butter
1/4 cup chopped green bell pepper
1 tablespoon white sugar
1/2 cup chopped onion
1 egg
1/2 cup mayonnaise
salt and pepper to taste
1/2 cup shredded Cheddar cheese
1/2 cup pecans, chopped
1/2 cup bread crumbs

(I skipped the bread crumbs and added more cheese)

Directions

Preheat oven to 350 degrees F (175 degrees C).
Bring a large pot of water to boil. Add squash, and cook until tender. Drain well.
Place squash in a large mixing bowl. Add butter, reserving 1/2 tablespoon, to the squash and mash well. Mix bell pepper, sugar, onion, egg, mayonnaise, salt and pepper, cheese and nuts to the mixture. Transfer the mixture to a 1-quart casserole dish. Top with bread crumbs. Dot with the reserved butter.
Bake at 350 degrees F (175 degrees C) for 35 to 40 minutes.