Boil the potatoes in their skins for about 40 min (pierce them to check they're cooked).

NextPeel the potatoes while still hot and pass them through a potato ricer or mash them.

Peel the potatoes while still hot and pass them through a potato ricer or mash them.

Meanwhile: Still hot and pass them through a potato ricer or mash them

NextMake a well with the flour and add the potato, mix, then add the egg and salt.

Make a well with the flour and add the potato, mix, then add the egg and salt.

NextKnead until the dough is elastic, smooth and doesn't stick to your hands.

Knead until the dough is elastic, smooth and doesn't stick to your hands.

NextTake pieces of dough and roll them into ropes about 1 cm thick, then cut into pieces about 2 cm long.

Take pieces of dough and roll them into ropes about 1 cm thick, then cut into pieces about 2 cm long.

NextShape them with a fork.

Shape them with a fork.

NextBoil the gnocchi in salted water.

Boil the gnocchi in salted water.

NextAdd them to the sauce, which should already be ready.

Add them to the sauce, which should already be ready.

NextCook the tomato with the spices, salt and oil over a low heat until done.

Cook the tomato with the spices, salt and oil over a low heat until done.

NextIf you don't want to cook them all, you can freeze them and, when you want them, put them straight into boiling water without defrosting.

If you don't want to cook them all, you can freeze them and, when you want them, put them straight into boiling water without defrosting.