Spinach and Chicken Phyllo Bake

lbs raw 99% lean ground chicken breast

medium onion, chopped

black pepper

dried oregano

salt

ground nutmeg

crushed red pepper flakes

garlic cloves, minced

each) packages frozen chopped spinach, thawed and squeezed dry

large eggs, beaten

crumbled feta cheese

2% shredded Mozzarella cheese

defrosted (9×14”) sheets Phyllo dough (such as Athens)