Green Bean Casserole - cooking recipe

Ingredients

1/3 c. chopped onion
2 Tbsp. butter
2 Tbsp. flour
1/2 tsp. salt
1 c. sour cream
1 c. grated Cheddar cheese
2 lb. cooked green beans or 2 (1 lb.) canned green beans

Preparation

Cook onion in butter until transparent.
Add flour and stir. Add sour cream and stir.
Pour over beans in an ovenproof baking dish.
Sprinkle with cheese and bake at 350\u00b0 for 20 minutes.