Cooking Steps

1. 

   Step1:Peel and cut potatoes. Steam them. Mash them while they are ho

2. 

   Step2:Hot pot. Put a piece of butter. Put in the chopped onion and stir fry it to make it fragrant. Turn off the heat. Mix the mashed potato with the onion. Add salt according to your taste

3. 

   Step3:Preheat the oven at 120 ℃ for five minutes. Put the mashed potatoes on the plate. Squeeze in the ketchup. Spread the mozzarella cheese slices on it

4. 

   Step4:Put it in the oven for 120 degrees. Always pay attention to the color of the cheese on the surface. Turn off the fire if it's colored