preheat oven to broil
line a baking sheet with parchment paper & lightly grease with olive oil
place the polenta slices on the sheet and broil for 2 minutes
remove from the oven and flip slices over, place back on sheet
add sauce first then cheese, and any toppings
broil for two minutes or longer until cheese melts
remove from oven. Serve hot or let cool, place in a container and store in the refrigerator for a day or two.