Heat a large skillet coated with cooking spray over medium heat.
Spread refried beans over a tortilla, then spread the Southwestern chicken filling, then add a sprinkling of extra-sharp cheddar cheese. Place the other tortilla on top.
Place in the skillet and cook for 3-4 minutes or until golden brown.
Carefully flip the quesadilla over and cook for an additional 3 minutes or until golden brown.
Remove from the skillet and let the quesadilla cool for a few minutes before slicing into four equal pieces.