1. (FILLING) Heat up olive oil in a pan. Fry onion until translucent. You need onions for the dough and some for the topping so I would suggest frying 3 small, finely diced onion until lightly caramelised.
2. Boil the potatoes in their skins with no salt. Make sure they are the same size, if not cut the big ones in half. Once the potatoes have been boiled put them through a potato ricer. Leave to cool.
3. Open tofu, drain water off. Wrap the tofu block in a clean piece of a kitchen towel and place it on a rack with a plate underneath and something heavy (like a jam jar) on top. The point is to extract all excess moisture as you don’t want the filling to be too wet.
4. Mash tofu up with a fork, season with 2 tsp of soy sauce and the juice of ˝ lemon to give it a subtle tang.
5. In a bowl, combine mashed potatoes, tofu and ˝ cup of sauteed onions. Season with salt and pepper. Leave aside.
6. (DOUGH) In a mixing bowl, combine flour and salt. Add 1 cup of hot water and 1˝ tbsp of oil. Once combined roughly with a wooden spoon, start combining the dough with your hands. It will need a bit more water but it is very important to add the water in gradually (tablespoon by tablespoon) until you achieve the correct consistency dough. Knead it for a few minutes with your hands and then set aside for 30 minutes under a clean kitchen towel or pierced (so that it can breathe) cling film so that the dough doesn’t dry up.
7. Once the dough has had a chance to rest, divide it into smaller parts (I would go with 6 portions with this much dough) and roll it out with a rolling pin on a lightly floured surface. You want it to be about 1-2 mm thin; the thinner the dough, the tastier the dumplings. With an upside down glass, cut out circles in the dough. Place a heaped teaspoon of the filling in the centre of each circle, fold the circle in half and press the edges of the semi-circle together with your fingers. Go over each dumpling twice to make sure everything is sealed completely. Put the finished dumplings on a lightly floured surface and cover them with a kitchen towel while making the rest so that they don’t dry out.
8. Bring a pot of water to boil, throw in 10 dumplings at a time and from the moment the water comes to the boil again count for 3-4 minutes (depending on how thick your dough is). Once the time is up, fish them out with a slotted spoon and place on a clean plate. Put a new batch in until you have cooked them all.
9. Heat up a little olive oil in a pan and place the cooled-down dumplings in the pan. Turn them after they’ve browned on one side. Make sure you don’t overcrowd the pan.
10. Whilst you are frying your dumplings, warm up the rest of your sauteed onion, season it with salt and pepper and serve with your dumplings.