1, microwave heating: place the burgers on a microwave-safe plate and cover with a lid or plastic wrap to prevent the food from drying out. Then set the microwave to medium to high heat for 30 seconds at a time, then flip it over once until the burger is completely heated to ensure it reaches the proper heating temperature.
2. Oven heating: Preheat the oven to 175°C. Place the burgers on a baking sheet, to which you can add a little water to prevent drying out. Then place the baking sheet in the oven and heat for 5-10 minutes until the burgers are completely heated through. You can also add some cheese or other toppings to the oven for extra flavor.
3. Heat the pan: Preheat the pan to medium heat, then place the burgers in the pan. Cover the pan and fry for 2-3 minutes on each side until the burgers are completely heated through. You can also add a little olive oil or butter to the frying process for extra flavor.