Remove chicken from pan and add the mushrooms. Cook and stir occasionally for five minutes.
Put the chicken back in the pan, sprinkle with the herbs and pour the wine on top. Cover pan tightly and cook on low heat for 30 minutes or until the chicken is cooked to your liking.
Remove the chicken to a serving plate. Into the sauce that remains in the pan, stir in the mustard and heavy cream. Warm on low heat for five minutes, then pour over chicken to serve.
Makes 6 servings.