Fridge: Refrigerate leftover Campbell's lemon chicken in an airtight container for 4 to 5 days. Freezer: This lemon chicken can be frozen in airtight containers for up to 3 months. Please let the frozen lemon chicken defrost in the fridge overnight before reheating. Reheat: Bake for 15 minutes at 350°F and microwave for 30 seconds to 1 minute.