Chicken Casserole - cooking recipe

Ingredients

2 c. cooked chicken, cut in pieces
1/4 c. butter
1/4 c. chopped onion
1/4 tsp. salt
dash of pepper
1/4 c. flour
1 can evaporated milk
4 oz. can mushroom pieces
1 (10 oz.) pkg. frozen, chopped broccoli, cooked and drained
1 c. grated Cheddar cheese

Preparation

Melt butter.
Saute onion.
Remove from heat.
Stir in flour, salt and pepper.
Drain mushrooms, reserve liquid, add enough water to make 1/2 cup liquid.
Gradually stir liquid into flour mixture.
Put back to heat.
Stir in evaporated milk.
Add mushrooms.
Cook over medium heat until thickened.