2 tbsp. butter
2 tbsp. flour
1 tsp. salt
1/4 tsp. pepper
1 tsp. sugar
1/4 c. finely chopped onion
1 (8 oz.) fat-free sour cream
2 cans (16 oz.) French-style green beans, drained
1/2 c. Kellogg's cornflake crumbs
1 tbsp. butter, melted

Melt butter in medium-size saucepan. Stir in flour, salt, pepper, sugar and onion. Stir in sour cream. Cook over low heat until thickened, stirring occasionally. Fold in green beans. Pour into 1 1/2-quart casserole coated with cooking spray. Combine Kellogg's cornflake crumbs with 1 tablespoon butter and sprinkle over top.

Bake at 350°F for 30 minutes or until hot.