Creating Chicken Quesadilla is straightforward if you follow these simple steps:

1. Prepare the Chicken: In a bowl, combine the shredded chicken with taco seasoning, mixing until well coated.
2. Heat Oil: In a large skillet, heat olive oil over medium heat.
3. Add Vegetables: If using, sauté the sliced bell peppers and onions in the skillet until tender, about 3-4 minutes.
4. Assemble Quesadillas: Place one tortilla in the skillet. Sprinkle half of the cheese evenly over the tortilla.
5. Add Chicken: Spread half of the seasoned chicken over the cheese, then top with more cheese and another tortilla.
6. Cook: Cook for 3-4 minutes until the bottom tortilla is golden brown. Carefully flip the quesadilla using a spatula and cook the other side for another 3-4 minutes until golden and crispy.
7. Repeat: Remove the cooked quesadilla from the skillet and repeat the process with the remaining tortillas and filling.
8. Slice: Once all quesadillas are cooked, let them cool slightly. Then, slice each quesadilla into wedges.
9. Serve: Arrange the wedges on a plate and garnish with fresh cilantro if desired.

These steps will guide you in creating this incredible Chicken Quesadilla effortlessly.