Place the tofu on a paper towel-lined plate. With another paper towel or clean dish towel, press the tofu to remove some of the water.
Crumble the tofu into a food processor and pulse together until crumbly. Add the remaining ricotta ingredients (minus the spinach) and pulse until mostly smooth.
Use the ricotta as you would traditional dairy ricotta. Or store in an airtight container in the fridge for 3 - 4 days.