parmesan cheese, shredded
Pulse spinach in food processor until finely chopped. Three batches worked best. Transfer to bowl.
Add ricotta, parmesan, eggs, salt and pepper; stir to combine.
Coat 8 cups of muffin pan with cooking spray. Divide spinach among those cups. Fill remaining cups with water for even baking.
Bake 20 minutes, until set. Let stand in pan 5 minutes.
Remove from pan and enjoy.