Conveniently arrange all the ingredients. Wash the turkey fillet and pat dry with a paper towel. Wash vegetables and herbs. Peel onions, potatoes and carrots. Prepare turkey fillet and vegetables. Cut the meat into 2x2 cm cubes. Cut the onion into cubes. Grate the carrots on a coarse grater. Cut the potatoes into large pieces. Cut the tomatoes into cubes. You will need a slow cooker.
Prepare the dish in a slow cooker. Pour vegetable oil into the bottom of the multicooker, add onions and carrots, turn on the frying mode for 10 minutes. Do not close the lid, stir the vegetables from time to time. Add the poultry fillet to the onions and carrots and fry until the meat turns white. Place potatoes, salt and black peppercorns in the multicooker bowl. Pour in a glass of water. Turn on the extinguishing mode for 40 minutes. 10 minutes before the end, add the prepared tomatoes and bay leaf. When the dish is ready, let it sit for 20 minutes.
To serve aromatic turkey with vegetables, prepare sour cream sauce. Chop the garlic, mix with sour cream, and add salt. Chop the parsley and dill. Sprinkle the dish with herbs.