Pelmeni are like little pockets of deliciousness that you eat with your mouth! They're kind of like ravioli or dumplings, but with a different filling. Pelmeni are usually made with a simple dough made of flour and water, rolled out into thin sheets and cut into circles with a special tool called a "pelmenitsa".
The filling for pelmeni can be anything from potato and cheese to meat and vegetables. Once you've got your filling, you put a little bit of it in the middle of each dough circle and then fold the circle in half, pinching the edges closed with your fingers.
After your pelmeni are all stuffed and pinched shut, you drop them into a pot of boiling water and let them cook for a few minutes until they float to the top. Then you scoop them out with a slotted spoon and serve them up with some sour cream or maybe some butter and onions.
In short, pelmeni are little pockets of dough filled with deliciousness that you cook in boiling water and eat with your mouth!