While the base is pre-baking
Heat 2 tablespoons of olive oil in a medium skillet over medium heat.
Add garlic and onion and season with a pinch of salt—cook, and stir for one minute.
Add the meat to the hot pan and break it into smaller pieces.
Cook and stir for about 3 to 5 minutes—you want the meat to be cooked all the way through but don't overcook since it is still going into the oven.
Stir in the tomato paste and let it mix with the meat's juices.
Immediately add the tomatoes and the spinach leaves— and stir for about 2 minutes or until the leaves are slightly wilted.
Season with cayenne pepper (optional), dried Basil, garlic or onion powder, and salt and pepper to taste.
Don't overcook the tomatoes and the spinach leaves, as they will cook further in the oven.
Set aside.
Take the base out of the oven after 15 minutes.
Use a slotted spoon to transfer the meat and vegetable medley on top of the polenta base omitting most of the juices in the pan.
Evenly spread everything out to all four corners of the pre-baked base.
Top with grated Parmesan cheese.
Then tear the mozzarella cheese into small pieces and divide it on top of the meat.
Place the pizza in the oven for 15 minutes until the cheese has melted, and the polenta dough is bubbling and golden brown.
Take out of the oven. It's best to let the pizza sit for 10 minutes before serving to allow the base to firm up.
It tastes delicious warm, or slightly cooled.