Wash and finely chop mint. Peel and grate onions. Add onions and mint to meat with salt and black pepper and mix well. Shape meat into small balls.
Heat some cooking oil in a pan until hot. Add meat-balls and fry for a few minutes until colour changes. Add a cup of hot water, turmeric, and a bit of salt and cook over medium heat for about 10 minutes. Add kashk and cook for another 2-3 minutes. Remove from heat, mix in crushed walnuts, and serve.