This is an old post but I guess I missed it back then. I don't like making meatloaf but my husband really likes it often.. So I found the easiest way to make it.
I add half a box stovetop stuffing mix with seasoning (half the seasoning packet if there is a packet) Add it to the ground beef usually about 1 1/2 lbs. Add one egg and chopped onion, I use frozen pre chopped. Top with 1/2 cup packed brown sugar
1-/1/2 teaspoons of mustard 2/3 cups ketchup mixed together. : Bake as usual.
Simple, fast, and my husband likes it.