My favorite meatloaf

Name: My favorite meatloaf
Ingredients: * 1.5 cup apple cider vinegar; * 1.5 cup light brown sugar; * 1 tbsp yellow mustard; * 1/4 cup ketchup; * meatloaf:; * 1 small onion finely diced; * 2 whole large egg; * 1 egg yolk; * 1/4 cup milk; * 1/2 cup ketchup; * 2 tbsp a 1 steak sauce; * 1/2 tsp salt; * 1/4 tsp ground black pepper; * 1/2 tsp dry mustard; * 1/2 tsp onion powder; * 1/4 tsp garlic powder; * 1 tsp dried parsley; * 1 tbsp minced garlic; * 1/4 cup panko bread crumb; * 1 sleeve crushed saltine cracker; * 2.5 lb 80/20 ground beef