2 (10 oz.) pkgs. frozen green beans
2 tbsp. butter
1/2 c. chopped onion
1/2 tsp. dry mustard
1 tbsp. vinegar
2 tsp. imitation bacon bits
2 tsp. brown sugar

Cook beans as directed on package. Drain. Melt butter in a large skillet over medium heat. Add onions and cook until tender. Reduce to low. Add beans and remaining ingredients to saucepan. Heat until hot.