Green Bean Casserole - cooking recipe

Ingredients

2 Tbsp. butter
2 Tbsp. all-purpose flour
2 c. milk
1 tsp. salt
1/4 tsp. pepper
2 (10 oz.) pkg. French-style green beans
1/2 lb. mushrooms, sliced
1 medium onion, chopped
2 c. medium cream sauce or cream of mushroom soup
1 (3 oz.) can French fried onions, crumbled

Preparation

Grease a 2-quart casserole dish.
Melt butter and stir in the flour until smooth.
Add the milk gradually; stir continuously. Cook until thickened and add salt and pepper.