Prepare the ingredients required from the list in the quantities specified in the recipe. Rinse the buckwheat with cold running water several times until the water is clear, peel the onions, sort the mushrooms and peel them.
Cut the peeled onion into medium cubes, cut the mushrooms into small pieces. Pour vegetable oil into a frying pan, place on the stove to heat up and add the onion to fry until golden brown. Then add the chopped mushrooms to the onions and fry the vegetables over high heat for 10 minutes until the moisture has completely evaporated. Salt the vegetables and mix thoroughly.
Place the washed buckwheat on top of the vegetables, salt and pepper it and fry it with the vegetables over medium heat for several minutes. Pour water over the buckwheat so that it completely covers the buckwheat, cover the pan with a lid and simmer the dish for 15 - 20 minutes over medium heat. When the dish is ready, remove it from the stove and leave it covered for another 10 minutes to steam.
Serve appetizing buckwheat porridge with vegetables in a frying pan as an independent dish, garnished with finely chopped herbs, or as a side dish for meat.