1 can French style green beans
1 pkg. frozen baby lima beans
1 pkg. frozen peas
1 can water chestnuts
1 med. onion

SAUCE:

1/2 c. mayonnaise
1 tsp. prepared mustard
1 tbsp. Worcestershire sauce

Drain liquid from vegetables. Mix in large casserole. Slice onion and place on top. Add chestnuts on top of onion. Mix together sauce ingredients and pour over vegetable mixture. Top with bread crumbs and drizzle with butter. Bake at 350 degrees for 30 minutes.