In a large bowl, combine chicken cubes with olive oil and seasoning. Set aside.
Slice the vegetables.
In a large pan over medium heat, melt butter and add sliced vegetables. Season with salt, black pepper, and garlic powder to taste. Cook for 5 minutes or until tender. Remove from pan.
In the same pan, add 1 tablespoon of olive oil. Add seasoned chicken and cook for 5-6 minutes or until chicken is cooked through. You can use a meat thermometer to ensure it reaches 165°F internally. Remove chicken from pan once cooked.
Add 1 tablespoon of olive oil to the pan. Place one flour tortilla in the pan and cook for 10-20 seconds, then flip. Add a layer of cheese, chicken, vegetables, and more cheese to one side of the tortilla. Fold the tortilla in half over the toppings. Cook for 30-40 seconds, then flip. Remove from the pan once the quesadilla reaches your desired crispiness.
Repeat with remaining tortillas and filling.
For the chipotle sour cream, combine all ingredients in a blender and blend for 30 seconds. Add 1 tablespoon of milk at a time until the desired creaminess is achieved.
Serve the quesadillas hot alongside your favorite salsa. All-Purpose Salsa - Bailees Kitchen