Put the flour in a bowl. Separate the eggs and whisk the yolks with the milk, water and salt and pour them into the flour. Mix everything into a smooth dough.
Finely chop the chives and add to the batter together with the parsley. Beat the egg whites until stiff and fold into the batter.
Heat a little butter in a non-stick frying pan and add about 3 tablespoons of batter for each omelette. Spread the dough thinly and bake until golden brown on both sides.
Fold in half to serve and garnish with pepper and sprouts.