Rancho Beans
["1 Tbsp. salad oil", "1 c. chopped onion", "1 lb. ground beef", "3/4 tsp. salt", "2 tsp. vinegar", "2 tsp. prepared mustard", "2 Tbsp. brown sugar", "2 (1 lb.) cans pork and beans"]
["Heat oil in skillet. Add onions; simmer until golden yellow. Add beef. Stir with fork until meat is done. Add remaining ingredients. Pour into bean pot or 2-quart casserole. Bake in 400\u00b0 oven for 30 minutes."]
["salad oil", "onion", "ground beef", "salt", "vinegar", "mustard", "brown sugar", "pork"]