Prepare the dough. In a glass, beat 1 glass of ice water and an egg with a fork or whisk. Sift the flour onto a flat surface, make a well and pour in the water and egg. Knead a homogeneous, elastic dough. Then cover the dough with elastic film and leave at room temperature for 1 hour.
Meanwhile, prepare the filling: in a bowl, mix the minced meat, onion, cilantro, salt and pepper to taste.
Roll out the dough into a thin layer 1 mm thick. Using a glass or a special form, cut out identical circles, put the filling in the center of each and form a manti.
Grease the steamer with soft butter or vegetable oil. Cook the manti in the steamer for 30-35 minutes.