Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/4  cup           vegetable oil
   3      tablespoons   tarragon vinegar
     1/4  cup           fresh lemon juice
   2      tablespoons   dry white wine
     1/2  teaspoon      freshly ground pepper
   1      teaspoon      dried tarragon
   6                    skinless -- boneless chicken
                        - breast halves
   4      tablespoons   butter or margarine
   2      tablespoons   style-style mustard

Preparation:

1. In a shallow dish, combine oil, lemon juice, and pepper. Add chicken and turn to coat with marinade. Marinate, turning occasionally, for 30 minutes. 2. Meanwhile, combine vinegar, wine, and tarragon in a small non-aluminum saucepan; boil until reduced to about 2 tablespoons. Reduce heat to low, add butter and mustard, and stir until butter melts. Set sauce aside; keep warm. 3. Drain chicken well. Grill or broil over medium heat, turning once, and basting frequently with mustard sauce, until just cooked through, about 5 minutes a side. Be careful not to overcook chicken. Serves 6. Prep: 15 minutes Marinate: 30 minutes Cook: 10 minutes Source: "365 Ways to Cook Chicken, by Cheryl Sedaker" Harper and Row, ISBN 0-06-015539-6