Combine onion, 8 ounces tomato sauce, ½ cup thick salsa, 2 tablespoons apple cider vinegar, 1½ tablespoons brown sugar, 1 tablespoon chili powder, 2 teaspoon Worcestershire sauce, black pepper to taste, chopped roast beef, 12 ounces beef broth, and minced garlic in a large pot.
Drain and rinse 15 ounces kidney beans and 15 ounces pinto beans.
Cook over medium heat for about 25 minutes or until cooked through. If needed for consistency, add additional beef broth during cooking.
Notes
If you’d like to stretch this dish, add some pasta to the pot about 10 minutes before serving (if there is not enough liquid, add additional broth and bring to a boil before adding pasta).