Lori'S Green Bean Supreme - cooking recipe

Ingredients

1/4 c. chopped onion
2 Tbsp. butter
2 Tbsp. flour
1/2 tsp. salt
dash of pepper
1/2 c. milk
1/2 c. sour cream
2 qt. cooked green beans
1 c. shredded Swiss cheese
onion rings (garnish)

Preparation

Baking Temperature: 350\u00b0.
Baking Time: 30 minutes.