Thaw the Spinach and squeeze out the excess water.
Pre-heat the oven to 400.
In a large bowl, mix the feta, parmesan cheese, egg, garlic, shallots, oregano, salt and black pepper until combined. Fold in the spinach.
Fill the mini phyllo cups with the spinach mixture.
Bake for 7-9 minutes until the top is browned.
Let rest to set for 3-4 minutes before serving.