Peel and cook Jerusalem artichoke until soft.
Drain Jerusalem artichokes and set aside to cool.
In the meantime, wash 4 leaves of wild garlic and cut them.
Place wild garlic and egg into a food processor or blender and blend ingredients them smooth consistency.
Blend Jerusalem artichoke and add egg mixture.
Add wheat flour, salt, and mushroom flour to the mixture. Mix the dough.
Dust the cutting board generously.
Take a piece of dough and make a roll of it. Add more flour if needed.
Cut the roll into bite-size cubes.
Bring a pot of salted water to a boil, add a bit of oil to the water.
Put the cubes in batches into the boiling water, make sure that they do not stick to the bottom of the pot.
Wait until the dumpling cubes will float on the water's surface.
Drain the dumplings.
(optional) Heat olive oil in a pan and add dumplings, fry until golden-brown of each side