Turkey, apple slices and cheese are perfect ingredients for a quick lunch or appetizer.
Spread 1 tablespoon mustard on 1 side of each tortilla. Layer 1 tortilla with 1 slice turkey, 1/2 apple slices and 3 slices cheese. Cover with 1 tortilla. Repeat with remaining tortillas. Brush melted butter on both sides of each quesadilla.
Heat 10-inch skillet or griddle. Grill quesadilla over medium heat, turning once, until cheese is melted and quesadilla is lightly browned (2 to 3 minutes). Repeat with remaining quesadilla. Cut into wedges.