Place the wontons on a clean work surface and moisten the edges with water. Evenly divide raisins onto the center of each wonton skin. Top each with 1 walnut piece and fold in half diagonally, pressing together the edges to seal tightly.
Place the wontons into the pot of simmering water for 1 minute. Remove with a slotted spoon to a paper towel to drain, discard water.
Place the wontons on cooking spray coated baking sheet. In a small bowl, mix together the brown sugar and cinnamon, sprinkle on the wontons and bake until lightly golden and crisp, about 8-10 minutes.