In a medium bowl, beat the eggs with a pinch of salt and pepper until well mixed.
Heat the olive oil in a non-stick skillet over medium heat. Add the diced bell peppers and sauté for 2-3 minutes until tender.
Pour in the beaten eggs and stir gently, cooking until just set (about 3-4 minutes). Remove from heat and stir in the chopped spinach and half of the cheese.
Lay two tortillas flat on a clean surface. Divide the egg mixture evenly between the two tortillas, spreading it out to cover. Top each with the remaining cheese.
Place the other two tortillas on top to create quesadillas.
In the same skillet, carefully place one quesadilla and cook for about 2-3 minutes per side or until golden brown and the cheese is melted. Repeat with the second quesadilla.
Remove from the skillet and slice each quesadilla into quarters.
Serve warm with salsa on the side and garnish with fresh cilantro leaves.
Notes
Feel free to customize with your favorite vegetables.