Chicken Casserole - cooking recipe

Ingredients

4 chicken breasts
3 Tbsp. butter
1/4 c. onion
1 can cream of chicken soup
1/4 c. milk
1/2 c. grated Cheddar cheese

Preparation

Boil chicken breasts until done.
Remove skin and bone from chicken and cut into bite size pieces.
Place in casserole dish; set aside.