Prepare the Cream Cheese Mixture: In a medium mixing bowl, combine the softened cream cheese, maple syrup, vanilla extract, ground cinnamon, and a tiny pinch of salt. Mix thoroughly with a wooden spoon until the mixture is smooth, light, and evenly combined. Take a moment to smell the sweet, comforting aroma of vanilla and cinnamon – it's already starting to feel like a treat!

Assemble the Quesadillas: Lay four of the tortillas flat on a clean work surface. Evenly spread about a quarter of the cream cheese mixture over each tortilla, leaving a small border around the edge. Next, scatter a quarter of the fresh blueberries over the cream cheese on each tortilla. If you're adding nuts, sprinkle those over the blueberries now.

Fold and Seal: Place the remaining four tortillas directly on top of the blueberry-topped tortillas, creating a sandwich. Gently press down all around the edges to help the two tortillas adhere slightly, forming a neat, disc-like shape.

Preheat the Pan: Heat a large frying pan or skillet over a medium heat. You want it warm enough to sizzle, but not so hot that it scorches. Melt about 1 tablespoon of the butter in the pan until it's glistening and just starting to bubble slightly.

Cook the First Batch: Carefully place one assembled quesadilla into the hot pan. Brush the top of the quesadilla generously with some of the melted butter. Cook for 3-4 minutes on the first side, or until the underside turns a beautiful golden brown and the edges begin to crisp up, emitting a wonderfully sweet, buttery scent. You might hear a gentle sizzle as it cooks.

Flip and Finish: Using a wide spatula, carefully flip the quesadilla over. Cook for another 3-4 minutes on the second side, or until it's also golden brown and the cheese inside has melted, becoming wonderfully gooey. You'll notice the quesadilla puffing up slightly and feeling warm and pliable to the touch. The blueberries will be soft and juicy.

Repeat and Serve: Remove the cooked quesadilla from the pan and place it on a cutting board. Repeat the cooking process with the remaining quesadillas, adding more melted butter to the pan as needed for each new batch. Once all quesadillas are cooked, slice each into quarters using a sharp knife. If desired, dust lightly with icing sugar before serving. The warmth and sweetness will fill your kitchen, a truly inviting smell!