1 (9 oz.) pkg. frozen cut green beans
1 (9 oz.) pkg. frozen lima beans
1 (9 oz.) pkg. frozen yellow wax beans
1/2 c. butter
1/4 c. flour
2 tsp. lemon juice
1/2 tsp. hot pepper sauce
2 c. milk
1 c. grated Parmesan cheese

Cook beans separately according to package directions until tender crisp. Mix and arrange in 1 1/2 quart casserole.

Melt 1/2 cup butter in saucepan. Stir in flour, lemon juice, and hot pepper sauce. Add milk; cook and stir until thickened, put over beans.

Sprinkle with cheese, dot with remaining butter. Bake at 350 degrees for 15 minutes.