Preheat oven to 400 degrees F.
Once your pie dough is ready, separate it into 12 balls.
Spread the dough with fingers on the bottom and half way up sides of each cup of 12 capacity muffin pan.
Bake for 10 minutes. Set aside.
While crust is baking, make filling by heating the oil in a large skillet over medium heat, add garlic and onion and cook until onion is softened.
Add the ground beef and cook until browned.
Stir in the broth, tomato paste, vinegar and salt and pepper.
Once the pie crust is done, evenly add the ground beef mixture into each muffin cup.
Top each evenly with shredded cheddar.
Before piping the creamy cauliflower mash onto each muffin cup, stir the mashed cauliflower with salt, pepper and butter. Taste and adjust seasonings if needed.
Add mashed cauliflower topping to a piping bag and pipe over each muffin.
Bake for 5 more minutes to melt the cheddar cheese to golden brown.
You can also broil for 2-3 minutes, watching carefully, just to brown the mashed cauliflower a bit.
Sprinkle over optional toppings before serving if desired.