Mix the flour and water, knead into a smooth dough. Wrap the dough in cling film, leave to rest at room temperature for approx. 30 mins.
Mix the mince with all the other ingredients up to and including the soy sauce, season.
Shape the dough into 4 rolls (each approx. 2 cm in diameter), then cut each roll into 9 equal pieces. On a lightly floured surface, roll out the pieces of dough into circles (each approx. 8 cm in diameter). Place approx. 1 tbsp of filling in the centre of each piece of dough, press the edges together over the filling using your thumb and forefinger, place on a floured tea towel.
Sit a steaming basket on a wide-bottomed pan. Fill with water until it is just below the bottom of the basket, arrange the momos in the steaming basket in portions. Cover the momos and cook over a medium heat for approx. 15 mins.