Oven: Remove the plastic lid and cover with foil or transfer the turkey to your own oven-safe ceramic casserole dish. Heat in a 350F oven for 20-30 minutes, or until heated through. For the juiciest turkey breast, consider basting it with pan juices every 15 minutes during cooking.

Microwave: Remove the plastic lid, cover with a microwave-safe lid and heat on high for 4-6 minutes, or until heated through. Stop and stir every 60 seconds to ensure even heating. Stop once heated through as to not overcook.