01 - In a mixing bowl, combine cooked chicken with olive oil, smoked paprika, garlic powder, onion powder, salt, and pepper. Toss until evenly coated.
02 - In a separate bowl, whisk together Greek yogurt, light ranch dressing, and chopped fresh chives until smooth and well combined.
03 - Lay tortillas flat. Spread a generous spoonful of ranch mixture over one half of each tortilla. Divide seasoned chicken, red bell pepper, spinach, red onion, cheddar cheese, and mozzarella cheese evenly among the tortillas, piling toppings on the ranch-covered half.
04 - Fold each tortilla in half, pressing gently to enclose the filling and create a half-moon shape.
05 - Heat a large nonstick skillet or griddle over medium heat and lightly coat with cooking spray. Cook quesadillas for 2 to 3 minutes per side, pressing gently with a spatula, until golden brown and cheese is fully melted.
06 - Transfer quesadillas to a cutting board and let rest for 1 to 2 minutes. Slice each into wedges and serve warm.