Preheat over to 425F and spray a 12 count muffin pan with cooking spray. Mold biscuits into the tray and par-bake for 6-8 minutes until light golden. Remove from oven and set aside

Heat the oil in a large skillet over medium heat and brown ground beef. Stir in onions, salt, pepper and garlic and mix together. Mix flour into the meat mixture and stir until a paste consistency is reached. Add beef stock to pan and stir in the vegetables and herbs, the last few minutes, until combined.

Reheat mashed potatoes in a microwave for 5-6 minutes. Stir in granulated garlic and onion powder.

Spoon equal amounts (appox 2 tablespoon) of warm potatoes on the bottoms of each par-baked biscuit. Then top with equal amounts of beef mixture (approx 2 tablespoon). Finally top with equal amounts of cheddar cheese. Return to oven and bake for 12-15 minutes until cheese is melted and browned. Remove from oven and allow to cool slightly before popping individual pies out with a knife.