Wash the chicken breast fillets, pat dry and cut into bite-sized pieces. Heat a pan with oil and fry the fillet pieces in it until they are well done. Remove the pieces and keep warm.
Drain the mushrooms and bamboo shoots and fry them in the same pan with the finely chopped onions for 5 minutes. This makes the sprouts nice and crisp.
Then add the fillet pieces again and stir in the sour cream. Season with mustard, vegetable stock and the spices. I recommend rice with this.