Preheat oven to 400.
Put cauliflower in food processor and pulse a few times until the mixture resembles course sand. This will give you about 2 cups.
Put in oven safe bowl and cover. Cook in microwave for about 4 minutes. Remove and set aside to cool (stir occasionally to help speed it up).
In second bowl mash together sweet potato and pureed lentils. Mix in whole lentils, parsley, both cheeses, egg and a good pinch of salt and pepper. Add hot pepper flakes and cauliflower, stirring to combine. Use your hands to form into a ball and place on a piece of parchment.
Roll out ball using rolling pin or hands to flatten evenly.
Place on baking sheet or preheated baking stone and bake for 15 minutes.
Remove from oven and add your pizza sauce, prosciutto and mozzarella cheese.
Place back in oven and back another 5 - 10 minutes or until cheese has started to brown. Remove and eat.