Spread 4 tortillas with a thin layer of squash puree. Sprinkle an even layer of cheese over each tortilla. Top with the remaining tortillas.
For a crispy quesadilla, grease a nonstick skillet and heat over medium heat. Once heated, add the prepared quesadilla, one at a time, and heat 2-3 minutes per side until the cheese is melted. Repeat with the remaining quesadillas.
For a soft quesadilla, place a single prepared quesadilla onto a heat-safe plate and cover with a lightly damp paper towel. Microwave for 45 seconds, or until the cheese is melted through. Repeat with the remaining quesadillas.
Let the quesadillas cool and then cut into wedges and serve.
Notes
Instead of Butternut Squash Puree, you can use sweet potato puree, carrot puree, or even 100% canned pumpkin.