From ruscusine.com. Here's what they say about this recipe........
Most people associate pelmeni with Siberia, and many recipes and references to the dish call it "Siberian dumplings." Pelmeni probably did originate in Siberia, where hundreds or even thousands could be made, and then frozen and stored outside during the long winters. However, the dumplings became very popular all over Russia. They are closely kin to "pot stickers," "pierogies," and other similar dumplings found in many cultures.
The Russian variety traditionally is made of flour, milk, one egg, and salt. The dough is rolled out fairly thin, and cut in circles approximately two inches in diameter. The filling is usually a mixture of minced pork, onions, garlic, salt, and pepper.
I'm guessing at the number of servings and the time to make these as I've never made them before and that info wasn't provided with the recipe.