Make the dough by mixing flour, water and egg, then roll it flat and cut into circles using a cup or a tea glass.
In the meantime, melt butter in a frying pan; add seasoned beef, onions and mushrooms and cook until soft. I usually use a blender to make the filling more consistent. Then place the teaspoon filling in the middle of the dough circle and fold it over to make a semi-circle shape. Press together the edges so that the feeling doesn’t come out during cooking.
Place them in boiling water and boil until they float (around 5 minutes); after you drain them, put them on your plate and enjoy.