My Meatloaf

I know there are about a gazillion meatloaf recipes out there (and yes I've tried my share) but I seem to like this one the best.

1 1/2 lbs ground beef (or meatloaf mix from the store)
1/2 onion, chopped
1 egg
1 cup milk
2 T brown sugar
2 T (Jack Daniel's) dijon mustard
1/3 cup ketchup
1 cup dried bread crumbs
salt
pepper

Combine beef, onion, egg, milk, bread crumbs, salt, and pepper. Place mixture in a lightly greased 9x5 pan. Combine mustard, ketchup and brown sugar and pour over the meatloaf. Bake at 350 degrees for 1 1/2 hrs.