01 - In a bowl, toss the cooked chicken with olive oil, smoked paprika, garlic powder, onion powder, salt, and pepper until evenly coated.
02 - In a separate bowl, combine Greek yogurt, ranch dressing, and chives to make the ranch mixture.
03 - Lay out the tortillas. On one half of each tortilla, spread a generous spoonful of the ranch mixture. Top with seasoned chicken, red bell pepper, spinach, red onion, cheddar, and mozzarella cheese, dividing ingredients evenly among the three tortillas.
04 - Fold each tortilla in half to cover the filling completely.
05 - Heat a large nonstick skillet or griddle over medium heat. Lightly spray with cooking spray. Cook each quesadilla for 2–3 minutes per side, pressing gently, until golden brown and cheese is melted.
06 - Let rest 1–2 minutes, then slice into wedges and serve warm.