Broccoli, Chicken and Cheese Casserole

2 packages frozen broccoli
4 cups cooked chicken - cut up
2 eggs
1/2 cup shredded cheese
1 can cream of mushroom soup
1/2 cup mayo
1 small onion, chopped into small pieces

1/2 stick butter
1 sleeve Ritz crackers, crumbled

Cook broccoli according to package directions, drain. Add all ingredients together, except the Ritz crackers and butter. Mix well, pour into a baking dish.

Melt the butter, add the cracker crumbs, and mix well. Add to the top of the casserole.

Bake 15 - 20 minutes in a 400° F oven until hot and bubbly.