The United States of Meatloaf

Name: The United States of Meatloaf
Ingredients: 1 tablespoon extra-virgin olive oil; 1 small Spanish onion, finely diced; Kosher salt; 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; Freshly ground pepper; 1 pound ground beef chuck; 1/2 pound ground pork; 1/2 pound ground veal; 1 cup coarsely crushed saltine crackers (about 24); 1/3 cup minced fresh parsley; 1/2 cup barbecue sauce; 1/4 cup packed light brown sugar; 1/4 cup apple cider vinegar; 2 tablespoons Sriracha