Ranch House Chicken Casserole

4 cups cooked chicken, cubed
2 cups grated American cheese
12 flour tortillas, quartered
1 onion, finely sliced

Sauce
1 cup chicken broth
1 can cream of chicken soup
1 can cream of mushroom soup

Layer half the chicken, cheese, tortillas, onion and half of sauce. Repeat for second layer with cheese on top. Bake uncovered for 1 hour at 350 degrees F.