01 - In a mixing bowl, combine chicken strips with olive oil, minced garlic, paprika, dried oregano, salt, and black pepper. Toss thoroughly to coat each piece.
02 - Heat a large nonstick skillet over medium-high heat. Add the marinated chicken in an even layer and cook for 5 to 6 minutes, turning occasionally, until chicken is fully cooked and lightly golden. Transfer to a plate and allow to rest briefly.
03 - Place tortillas flat on a clean surface. Evenly distribute cooked chicken, mozzarella cheese, cheddar cheese, sliced red onion, diced tomato, and baby spinach over the center of each tortilla.
04 - Fold the sides of each tortilla inward, then roll up tightly from the bottom to enclose the filling and create a compact wrap.
05 - Melt unsalted butter in a large skillet over medium heat. Position the wraps seam-side down and grill for 2 to 3 minutes per side, pressing gently, until the tortillas are golden and the cheese has melted.
06 - Remove the wraps from the skillet. Slice in halves if desired and serve immediately while hot.