Brown the sausage in a nonstick skillet, breaking it apart as it cooks.
Once fully cooked, sprinkle the flour over the sausage and stir for about a minute.
Gradually add the milk, stirring continuously. Let it simmer and thicken. Season with salt, pepper, garlic powder, and cayenne pepper.
Remove from heat and let the gravy cool.
Unroll the pie crust and fit it into a 9-inch pie plate. Crimp the edges, line the bottom with parchment paper, and fill with dried beans. Bake at 450°F for 6 to 8 minutes. Remove the beans and parchment.
Pour the sausage gravy into the pie crust. Place a whole biscuit in the center of the pie. Cut the remaining biscuits to fit around the center biscuit.