Preheat Oven: Preheat your oven to 400°F (200°C).
Prepare Dish: Place the Apple, Cranberry & Cheddar Tarts on a baking sheet.
Cover Lightly: Lightly tent the Apple, Cranberry & Cheddar Tarts with aluminum foil to prevent excessive browning while reheating.
Reheat Time: Heat for 10-15 minutes.
Crisp Pastry: For the last 3-5 minutes of reheating, remove the foil to allow the pastry to become crisp and golden brown.