Roast the sweet potatoes until they are starting to brown and are tender in the middle, about 25 minutes.
Add the kale to the sheet pan and roast for an additional 5 minutes.
Assemble the quesadillas on a parchment paper-lined sheet pan.
Sprinkle half a tortilla with cheese. Spoon on the filling and sprinkle with additional cheese. Fold over the tortilla and bake for 10-12 minutes.