La Reina Sandwich

Name: La Reina Sandwich
Ingredients: One 3- to 4-pound pork collar; 1/2 to 1 cup dry rub, plus additional for sprinkling; 4 cups Honey BBQ Glaze, recipe follows; 4 to 5 large tomatoes, sliced 1/4-inch thick; 1/2 cup olive oil; 8 cups finely diced yellow onions; 3 bolillo buns (large sandwich rolls); 4 tablespoons butter; 3 1/2 cups ketchup; 3 cups distilled white vinegar; 1/4 cup mustard; 1/4 cup sliced onion; 1/4 cup Worcestershire sauce; 2 tablespoons ground black pepper; 1 tablespoon dry rub; 1/4 tablespoon granulated garlic; 1 1/2 cups honey