sentence: combine the meat with half of the onion salt bay leaf dried mushrooms peppercorns and water sentence: cook for around an hour and let it cool sentence: grind the cooked meat mixture in a food processor sentence: chop the other half of the onion and cook it with a little bit of oil sentence: transfer the meat in to a bowl and add the onion sentence: season with salt and pepper and mix very well sentence: in the food processor add flour and salt sentence: pulse few times and then add the water sentence: let the food processor process the dough for another minute sentence: divide the dough in 2 portions sentence: keep rolling until you get 1 to 2 mm thick dough sentence: with a glass or large cookie cutter cut circles and take the remaining dough sentence: wrap the meat mixture in the small dough portions sentence: boil the wrapped pierogies in boiling salted water sentence: fry the boiled pierogies with a little oil in a pan and then serve