Prep the chicken: Shred or finely chop your cooked chicken. If using rotisserie, remove skin and bones. Aim for small pieces so the filling spreads evenly.
Sauté the veggies: In a skillet over medium heat, add a teaspoon of oil.
Cook onion and bell pepper for 3–4 minutes until soft. If using jalapeño, add it now. Season with a pinch of salt.
Season the filling: Add chicken to the skillet with chili powder, cumin, garlic powder, smoked paprika, salt, and pepper.
Squeeze in a little lime juice. Stir for 1–2 minutes to warm and bloom the spices.
Add optional mix-ins: Stir in a small handful of corn or black beans if you like. Don’t overload the mix—too much filling makes sealing tricky.
Build the minis: Lay out mini tortillas.
Sprinkle a light layer of cheese on half of each tortilla. Add a spoonful of chicken mixture, then another light sprinkle of cheese. Fold into half-moons and press gently.
Toast the quesadillas: Heat a nonstick skillet over medium heat.
Add a thin film of oil or a light swipe of butter. Cook quesadillas 2–3 minutes per side until golden and crisp, pressing slightly with a spatula. Work in batches.
Keep warm: Place finished quesadillas on a sheet pan in a 200°F (95°C) oven while you cook the rest.
This keeps them crisp without overcooking.
Serve with toppings: Slice if needed and serve with salsa, guacamole, sour cream or Greek yogurt, chopped cilantro, green onions, and lime wedges.