Begin by heating the olive oil in a large skillet over medium heat. Once hot, add the sliced onion and diced red bell pepper to the skillet. Sauté for about 5-7 minutes, stirring occasionally, until the vegetables are softened and translucent.
Next, stir in the chopped spinach and cook for an additional 2-3 minutes, until the spinach has wilted down. Add the garlic powder, ground cumin, salt, and black pepper to the mixture, ensuring everything is evenly coated. Remove the skillet from heat and allow the filling to cool slightly.
In a mixing bowl, combine the cooled vegetable mixture with the crumbled feta cheese and shredded mozzarella cheese. Gently fold the ingredients together until they are well mixed and evenly distributed.
Wipe out the skillet to remove any leftover bits, then return it to medium heat. Place one flour tortilla in the skillet and spoon a generous portion of the spinach and cheese mixture onto half of the tortilla.
Carefully fold the tortilla in half to enclose the filling. Cook for approximately 3-4 minutes on each side, or until the quesadilla is golden brown and the cheese has melted. Repeat this process with the remaining tortillas and filling until all quesadillas are prepared.
Once all the quesadillas are cooked, transfer them to a cutting board and cut each into wedges for easy serving.
Just before serving, garnish the quesadilla wedges with a sprinkle of fresh chopped parsley for an added touch of freshness.
Notes
Arrange the quesadilla wedges on a vibrant serving platter. Offer bowls of salsa and sour cream for dipping alongside the quesadillas, and add a sprig of parsley on top for a splash of color!