Leftover Green Beans - cooking recipe

Ingredients

butter
chopped onion
green beans
1/4 c. vinegar

Preparation

Rinse green beans very well.
Put some butter in pan, then add chopped onion.
Let let 3 to 5 minutes, then pour beans in and let cook 5 minutes more.
Put vinegar in and let simmer slow for 3 more minutes.