Start by washing and chopping the fresh spinach. Set it aside in a bowl.

In another bowl, mix the crumbled feta and shredded mozzarella. Add a sprinkle of salt and pepper to taste.

Gently fold the chopped spinach into the cheese mixture until well incorporated.

In a skillet, heat the olive oil over medium heat.

Take one tortilla and spoon some of the spinach and cheese mixture on one half. Fold the other half over to create a half-moon shape.

Place the folded quesadilla in the skillet. Cook for about 2-3 minutes on each side, or until golden brown and crispy.

Repeat the process with the remaining tortillas and filling mixture.

Once cooked, slice each quesadilla into wedges, and serve warm with your favorite dipping sauces.