broccoli casserole recipe

Ingredients:** - 4 cups fresh broccoli florets - 1 can (10.5 oz) condensed cream of mushroom soup - 1/2 cup mayonnaise - 1/2 cup shredded cheddar cheese - 1/4 cup finely chopped onion - 1 large egg, beaten - 1 cup crushed Ritz crackers (or breadcrumbs) - 2 tablespoons melted butter - Salt and pepper to taste