Preheat your Blackstone griddle to medium-high heat, around 350-400°F. If your griddle has multiple burners, you can set up a two-zone cooking area as described earlier, with one side hotter for cooking and the other side cooler for warming.
In a bowl, combine sliced chicken with cumin, paprika, chili powder, salt, pepper, and the homemade seasoning blend. Mix well to coat the chicken evenly.
Once the griddle is hot, lightly oil the cooking surface or spray it with cooking spray to prevent sticking.Cook the seasoned chicken on the griddle until fully cooked and slightly charred, approximately 5-7 minutes per side. Once the chicken is cooked, remove it from the griddle and let it rest for a few minutes. Then, slice the chicken into thin strips or shred it using two forks.
Place a tortilla on the griddle. Sprinkle a generous amount of shredded cheese on half of the tortilla.
Top the cheese with the cooked black beans, salsa, and sliced or shredded chicken.
Fold the other half of the tortilla over the filling, creating a half-moon shape.
Press down gently on the quesadillas with a spatula to help seal them and ensure even cooking.Cook each quesadilla for 2-3 minutes on each side or until golden and crispy. Remove the quesadillas from the griddle and let them rest for a minute before slicing.
Serve with your favorite toppings like salsa, guacamole, sour cream, and a sprinkle of chopped cilantro.