Turkish Kitchen - Chicken with tarragon

Chicken with tarragon

4    Boneless chicken breasts  

3  green onions, cut crosswise 

400 gm fresh mushrooms 

1 cup liquid cooking cream 

3 cups chicken broth 

¼ cup vegetable oil 

2 tablespoons dried tarragon 

6-8 sheets of Filo Pastry dough 

2 tablespoons liquid butter

1 tablespoon flour 

1/2 teaspoon salt 

A pinch of black pepper