Pre-heat oven to 350°F (175°C). Grease an approx. 8.5"x4.5" bread loaf pan or baking dish.
In a large bowl combine all the meatloaf ingredients (beef, bread crumbs, egg, parsley, onion, garlic, Worcestershire sauce, mustard powder, salt, pepper, ketchup or tomato sauce, and milk). Cook a small piece of the meat at the point to taste for seasonings. If you want to add more salt/pepper, add it now before baking.
Transfer the mixture to baking dish and gently smooth out the top, but do not press down too much on the meat. You don’t want the meat to be too dense by packing it down hard.
Make the sauce: combine all the sauce ingredients (ketchup, bbq sauce, apple cider vinegar, brown sugar, smoked paprika, and chipotle) and pour over the top and top edges of the meatloaf.
Bake in oven for about 1 hour to 1 hour 15 minutes or until the loaf is cooked through and the internal temperature is at least 160°F (71°C).