Heat a non-stick pan over medium heat. Once hot, add the oil. Sauté the onion and peppers until they start to soften. Then add in the chicken, paprika, garlic powder, cumin, and season with salt and pepper. Saute until the chicken is browned well and cooked to an internal temperature of 160 degrees using a thermometer. Then remove the pan from the heat.
Preheat a panini style grill. (Alternatively, use a nonstick pan on medium low heat)
Spread the cheese onto the tortilla and top with chicken mixture then fold the tortilla in half.
Cook the quesadilla on the panini grill until golden brown on both sides and cheese is melted. (if using a nonstick pan, cook on both sides to golden brown)
Cut into wedges. Serve with sour cream.
Notes
Pro Tip - watch the heat, don't be afraid to use a lower temperature so that the outside gradually comes to a golden brown while the cheese is melting.