Season and Cook the Chicken. Start by seasoning the chicken breasts with salt, pepper, cumin, and chili powder. Heat olive oil in a skillet and cook for 7-9 minutes or until the chicken until golden and fully cooked to an internal temperature of 165F. Once done, shred or chop it into bite-sized pieces.
Assemble the Quesadillas. Place a tortilla on a flat surface, sprinkle a layer of shredded cheese, followed by the cooked chicken, and any other fillings you prefer. Top with more cheese, then place another tortilla on top. Toss any veggies that may need cooked into the skillet with the chicken and cook for an additional 2-3 minutes until softened.
Assemble the Quesadillas. Place a tortilla on a flat surface, sprinkle a layer of shredded cheese, followed by the cooked chicken, and any other fillings you prefer. Top with more cheese, then place another tortilla on top.
Cook Until Crispy. Heat a skillet over medium heat and add a small amount of olive oil or butter. Place the quesadilla in the skillet, cooking for 2-3 minutes per side until the tortilla is golden brown and the cheese is fully melted.
Slice and Serve. Once cooked, transfer to a cutting board and slice into wedges. Serve with salsa, guacamole, or sour cream.