Chicken, Mushroom and Leek Fricassee

Ingredients:
2 large skinless boneless chicken breast halves, cut into 1-inch pieces
1 1/2 T butter
8 ounces mushrooms, sliced
1 small leek (white and pale green parts only), thinly sliced
2 teaspoons chopped fresh tarragon or 1 teaspoon dried
1/3 cup dry white wine
1/3 cup whipping cream

Preparing the chicken:
Sprinkle chicken with salt and pepper. Melt butter in heavy large skillet over medium-high heat. Add chicken, mushrooms, leek and tarragon. Sauté 8 minutes. Add wine and cream. Reduce heat to medium. Cover skillet; simmer until chicken is cooked through, about 2 minutes. Uncover; simmer until mushrooms and leek are tender and sauce thickens enough to coat spoon, about 2 minutes longer. Season with salt and pepper.