1 med. onion, thinly sliced
1/2 c. butter, divided
2 (10 oz.) pkgs. frozen green beans, thawed & drained
1 c. sour cream (can substitute non-fat yogurt)
1/4 c. flour
1 tsp. salt
1 tsp. pepper
1 c. cheddar cheese, shredded (can use Lite-Line cheese)
1 c. soft bread crumbs or cracker crumbs

Saute onion in 1/4 cup butter. Add beans, sour cream (or yogurt), flour and seasonings; mix lightly. Pour in greased 1 1/2 quart casserole. Sprinkle with cheese, top with crumbs which have been mixed with 1/4 cup melted butter. Bake at 350 degrees for 25 minutes. Serves 4 to 6 people.