Bean Casserole - cooking recipe

Ingredients

1 can butter beans
1 can English peas
1 can French-cut green beans
2 boiled eggs
1 large onion, sliced
1 tsp. dry mustard
1 c. mayonnaise

Preparation

Mix all beans together and cook on low heat for 1 hour. Drain.
Combine remaining ingredients, except onion, and pour over bean mixture.
Heat until it bubbles.
Cover with onion rings and brown in 350\u00b0 oven.