Preheat the oven on 180-200°C.
Grease a big oven dish with olive oil. Add a layer of mashed potatoes. Add a layer of Di Papa sauce, using a spatula with holes. The meat sauce should not be too watery. Add a layer of grated cheese. Add a final layer of mashed potatoes.
Put it in the over for an hour
It will need some time to cool down before you eat it, which is frustrating. But you should, you will burn your mouth.