Peel and slice the sweet potato. Put the sweet potato in a pot and cover with water. Cover with a lid and turn on the heat.
Cook until tender and drain. Place the pot on the heat and evaporate the excess water in the pot.
Mash the sweet potato until smooth. Stir in the ＊ ingredients.
Allow the mixture to cool. Add the egg yolk and cake flour. Combine to make a dough (adjust the amount of the flour to obtain the right texture).
Roll Step 4 into a long sausage shape on a floured surface and cut into small pieces (divide the dough into 2 portions first and it's easier.
Flour all over. Press a piece onto a fork with your thumb. Roll out and curl the dough piece (see Steps 14-16 for details).
Boil plenty of water and add a generous amont of salt. Cook the gnocchi. When the gnocchi floats to the surface, continue to cook for a further 1-2 minutes. It is ready!
Drain the gnocchi in a colander.
Slice the garlic and onion thinly. Cut the bacon into 1 cm widths. Discard the woody bottom of the maitake mushrooms and separate into small pieces.
Heat olive oil in a frying pan and saute the garlic until fragrant. Add the onion, bacon and maitake mushrooms and saute further.
Once the vegetables start to sweat, add the gnocchi and butter. Mix together until the butter is evenly distributed. Season with salt and pepper.
Transfer into a serving dish. Sprinkle with grated parmesan cheese and chopped parsley.
Cook the gnocchi and cool in cold water. Toss in a tablespoon of olive oil. You can keep this in the fridge for several days.
[How to shape the gnocchi] Flour all sides of sliced gnocchi. Place a piece on a fork.
Press it with your thumb to indent the back of the gnocchi...
Roll out, curl the gnocchi and remove from the fork, using your thumb. The indented sides will be on the outside.
Story Behind this Recipe
I was given a lot of sweet potatoes and had to use them up.
Adjust the amount of the flour according to the moistness of the sweet potatoes. Make smaller pieces than regular sizes as when gnocchi is cooked it swells. After adding the butter cook quickly to retain the flavour.