Barbecue Bacon Cheeseburger Meal Starter

Name: Barbecue Bacon Cheeseburger Meal Starter
Ingredients: 1 pound Sliced Smoked Bacon, Cut Into 1/2 Strips; 5 pounds 90% Lean Ground Beef; 2 cups Ketchup; ½ cups Packed Light Brown Sugar; ½ cups Cider Vinegar; 2 Tablespoons Prepared Yellow Mustard; 3 cloves To 5 Cloves Garlic, Peeled And Minced; 1 teaspoon Kosher Salt; ¼ teaspoons Or More To Taste, Crushed Red Pepper Flakes; 4 cups Shredded Cheddar Or Monterey Jack Cheese; ½ teaspoons Or More To Taste, Freshly Ground Black Pepper; 1 whole Small Onion, Peeled And Finely Chopped, Optional