Preheat oven to 400°F (205°C). Place a 12" cast iron pan into the oven as the oven is preheating so the pan heats up as well.
*Soak red lentils in water for at least 4 hours, ideally for 8-12 hours. If you don't soak your lentils, you will need to add more water when blending (about 3/4 cup instead of 1/2 cup).
**You can find the recipe for Parmesan cheese here.
***Prep time does not include soaking the lentils (4-12 hours).