Mix blueberries, peaches, goat cheese, onions, and thyme in a medium bowl.
Lay out tortillas on a work surface. Spoon one-quarter blueberry filling over half of each tortilla. Fold the other half of the tortilla over filling.
Spray a large sauté pan with cooking spray. Heat the pan over medium heat until hot. Place two quesadillas, side by side, in the pan. Cook for 2 minutes on each side or until cheese is melted, being careful not to burn. Transfer quesadillas to a cutting board. Cook remaining two quesadillas. Cut each quesadilla into three wedges.
Plate fruit filled quesadillas and serve with Sweet Potato Leek Soup.
Source: Quick & Kosher: Meals in Minutes by JAMIE GELLER