United States of Meatloaf

Name: United States of Meatloaf
Ingredients: 1 tablespoon olive oil; 1 small Spanish onion, cut into small dice; Kosher salt and freshly cracked black pepper; 3 cloves garlic, minced; 1/2 cup whole milk; 1 tablespoon Dijon mustard; 1 tablespoon Worcestershire sauce; 1 teaspoon hot sauce, such as Tabasco; 2 large eggs; 1 pound ground chuck; 8 ounces ground pork; 8 ounces ground veal; 1 cup coarsely crushed saltine crackers (about 24); 1/3 cup minced fresh parsley; 1/2 cup barbecue sauce; 1/4 cup brown sugar; 1/4 cup apple cider vinegar; 2 tablespoons sriracha sauce