BBQ-Sauce - for this recipe I used a store-brand barbecue sauce. Mustard - yellow mustard is used in this copycat recipe. See the substitutions for other options.
Squeeze lemons for juice (1/4 cup). Place in large sauté pan: onions, 1 cup broth, tomato paste, mustard, lemon juice, vinegar, Worcestershire, salt, and pepper; stir until combined. Bring to a boil ...