Summarize the following:
When they've reached the fall-apart stage, take them out to get them ready for the next step. It's time for the final stage of cooking, which will ensure the ribs have a crispy exterior. If you treated your ribs with a rub, you can skip the barbecue sauce, but either way it adds a flavor burst to the ribs. Paint the top of the ribs with a liberal amount of barbecue sauce. You can whip up your own barbecue sauce by simmering the following ingredients together for 30 minutes beforehand:  1 1/2 cups ketchup 1/2 cup brown sugar 3 garlic cloves, minced 3 tablespoons apple cider vinegar 3 tablespoons Worcestershire sauce 1 teaspoon freshly ground black pepper 1/2 teaspoon salt Let them cook for an additional 10 minutes under the broiler, until the tops of the ribs turn brown and crispy. Place them on a plate to cool for a few moments. Barbecue beef ribs are excellent with  potato salad,  macaroni salad and extra barbecue sauce.

Summary:
Remove the ribs from the oven or grill. Open the foil and add  barbecue sauce. Place the ribs under the broiler. Remove the ribs from heat. Serve the ribs.