Yes, green bean casserole can be reheated without using a microwave or oven. Here are a few alternative methods you can try:
Stovetop: Transfer the green bean casserole to a saucepan or skillet and heat it over low to medium heat. Stir occasionally to ensure even heating. This method may take a bit longer than using a microwave or oven, but it allows you to control the temperature and prevent burning.
Steamer: If you have a steamer or a double boiler, you can place the casserole in the steamer basket or the upper pot of the double boiler. Steam it until it reaches the desired temperature. This method helps retain moisture and prevents the casserole from drying out.
Slow cooker: Transfer the green bean casserole to a slow cooker and heat it on low heat. This method is convenient if you have a slow cooker available and want to keep the casserole warm for an extended period. Stir occasionally to ensure even heating.
Skillet or frying pan: Transfer individual portions of the casserole to a skillet or frying pan and heat them over low to medium heat. This method is useful if you have leftover portions and want to reheat them individually.
Remember to cover the casserole with a lid or aluminum foil while reheating to help retain moisture. The exact heating time will depend on the size and thickness of the casserole, so monitor it closely to avoid overcooking or burning.
Regardless of the method you choose, ensure that the casserole reaches a safe internal temperature of 165°F (74°C) before consuming to prevent foodborne illnesses.