Mustard Meatloaf with Sweet and Spicy Sauce

I had a craving for meatloaf but none of my traditional recipes sounded good.  So, I created this new one!

For the meatloaf:
3 lbs lean ground beef
1 medium onion, chopped fine
4 cloves garlic, minced
2 tbs dried parsley
1 tsp seasoning salt
1/2 tsp black pepper
1/2 cup yellow mustard
4 tbs Worcestershire sauce
2 eggs

Mix everything together.
Shape into a loaf on a large rimmed baking sheet.
Surround with quartered potatoes if desired (they absorb all the flavors).
Bake at 350 for about 1 1/2 hours or until the meatloaf is done and the potatoes are tender.

For the sauce:
1/2 cup brown sugar
1 cup tomato sauce (plain)
1/4 cup ketchup
2 tbs cider vinegar
1 tbs Worcestershire sauce
2 tbs garlic flavored hot sauce
1/2 tsp cayenne pepper
1/4 tsp garlic powder

Place everything in a pot and whisk to dissolve the sugar.
Bring to a boil then reduce heat to a simmer.
Simmer until the desired thickness is achieved.
Serve as a sauce on the side with the mustard meatloaf and potatoes or use to glaze the mustard meatloaf by spreading it on the top then placing under the broiler until a slight crust is achieved.