Gnocchi al pomodoro e mozzarella (potato dumplings in tomato and basil sauce)

Place the unpeeled potatoes in a large saucepan, cover with salted water, and bring to the boil. Cook for 15-20 minutes until tender. Drain, and peel before mashing and pushing through a potato ricer (which looks a bit like a large garlic press).

Beat in the eggs and flour while the potatoes are still hot. Season with salt and pepper.

Using your hand, knead the mixture for about 3-4 minutes - until it becomes a smooth, soft dough. Take a handful of the potato mixture and roll into a long thin sausage shape, about 1.5cm thickness.

Slice the potato rope into lengths - about 1.5cm long. Using your thumb, roll the potato dumpling against the prongs of a fork, which will create ridge marks on one side. Do this with all the gnocchi before arranging them on a well-floured tray.

To prepare the sauce; soften the onions in a large frying pan with the olive oil. After about 5 minutes, add the passata and basil leaves, season with salt and pepper, and cook on a low heat for about 10 minutes, until the sauce thickens.

Bring a large pan of salted water to the boil and cook the gnocchi, in batches for 2-3 minutes, until they rise to the surface.

Using a wire scoop, transfer the cooked gnocchi from the water into the tomato sauce. Simmer a further two minutes before adding the mozzarella cheese. Serve straight away with a dusting of grated Parmesan cheese on top.