Place glaze ingredients in a sauce pan and mix well. Heat to simmering, and stir frequently while you mix up the loaf ingredients.
Finely chop the onion and mix in all of the other loaf ingredients except the ground beef. Stir until well combined, and then add ground beef and mix until fully incorporated.
Press down into large oven-safe pan, and make space between the edge of the loaf and the pan.
Pour glaze over the loaf, leaving room for the glaze to mix with the fat and juices from the beef. Keep the remaining glaze warm on the stove until the loaf is done cooking.
Bake the meatloaf at 375 for approximately 1 hour, or until the internal temperature reaches 160 degrees. Remove from oven, and carefully pour the glaze/sauce mixture from the baking dish into the sauce pan. Whisk together well.
Slice the loaf and serve with mashed potatoes and a vegetable, spooning some of the sauce/glaze mixture over the individual slices of meatloaf and on the potatoes as well.