Fry the sliced chicken in a hot pan with pepper, salt, paprika powder and the ground mustard seeds, if necessary add a chopped onion and fry with it. Deglaze everything with the stock, bring to the boil and simmer for 5 minutes.
Add 150 ml cream and stir in the mustard. Let simmer further.
Mix the rest of the cream with 2 teaspoons of flour and use it to bind the strips. Season to taste with pepper, salt and paprika.