Preheat oil in a deep pan. Coat potatoes in flour.When oil is hot, put chips in one after the other. Fry them till they are a bit golden brown. Once cooked remove from the pan and place on a kitchen towel to drain the oil.

Cut the onion into slices, and deep fry in the same oil you used to fry potatoes. Fry them till they look burned but should not be black. Remove from pan and place on a kitchen towel.

Place the chips on a baking tray, season with salt, add grated cheeder cheese and mix a bit. Put onions and green chillies on top of the chips and another grated cheeder cheese. Put in the oven and bake for 3 minutes.

Remove from oven, dish up, add the mayonnaise and cheese sauce.Serve hot.