Preheat oven to 375 degrees Fahrenheit. Grease a muffin tin with cooking spray.
Flour a clean, flat surface and place the 2 thawed-out pie crusts down. Using a 3-inch cookie cutter, cut out 6 circles from each pie crust (you will end up with 12 circles total).
Gently push each pie crust circle into the muffin tin and use your finger to smooth out the edges.
Bake the pie crusts for about 6-8 minutes. Then remove the pie crusts from the oven and turn the broiler on.
Add the onion, garlic, and olive oil to a large skillet and sauté for 1-2 minutes, or until fragrant.
Add in the ground beef and brown for about 5 minutes. Drain the fat and return the pan to the stove.
Add in the Worcestershire sauce and frozen vegetables and combine.
Move the beef mixture to one side and add butter and flour. Mix the butter and flour until it becomes a slightly thickened sauce. Combine with the beef mixture.
Add the beef broth and mix it into the beef mixture. Let this simmer for about 5 minutes.
Add 1 tbsp of beef mixture to each mini pie crust (I like to use a small cookie scoop to do this). Top the beef mixture with 1-2 tablespoons of mashed potatoes, then sprinkle a dash of paprika onto each pie.
Broil the pies for 5-7 minutes in the oven.
Once finished, garnish the pies with freshly chopped parsley and serve warm. Enjoy!