25 ml olive oil 2 tbsp
2 large onions, sliced
salt & pepper to taste
75 ml beef broth 1/3 cup
125 ml barbecue sauce 1/2 cup
20 ml apple cider vinegar or white vinegar 1 1/2 tbsp
Heat oil in large skillet over medium-high heat. Add onions, salt and pepper; cook until onions begin to brown, stirring frequently, about 8 minutes. Add broth, barbecue sauce and vinegar. Reduce heat to medium; simmer until sauce thickens, stirring occasionally, about 15 minutes. You can make one day ahead; cover, chill and rewarm before serving. Serve with burgers.
Serves 4