In a skillet, brown ground beef and onion until the beef is not pink and onion is tender.
Add A-1, ketchup, gravy packet, broth, seasoning, and vegetables. Stir and allow the mixture to lightly simmer and thicken for about 5 minutes.
While meat cooks, lightly grease a 12-cup muffin pan with cooking spray. To prepare the biscuits, slightly flatten the biscuit by stretching it with your fingers. Press the biscuit into the muffin tin and push the dough up the sides.
Evenly spoon the beef into the dough cups.
Place mashed potatoes in a gallon bag and push them into one of the corners. Snip off the end of the corner and pipe the potatoes on top of the pies.