Lemon Chicken Salad

This comes from MarthaStewart.com, it looks really yummy to me, however I have not tried it yet.

2 1/2 teaspoons dried tarragon
2 teaspoons grated lemon zest
1 1/4 teaspoons coarse salt
1/4 teaspoon ground pepper
4 bone-in chicken breast halves
1/3 cup low-fat plain yogurt
2 teaspoons plus 1 tablespoon olive oil
3 teaspoons fresh lemon juice
3 plum tomatoes, coarsely chopped
4 scallions, thinly sliced
6 ounces mesclun (about 6 cups)
Directions
Preheat oven to 425 degrees. Rub tarragon, 1 teaspoon lemon zest, 3/4 teaspoon salt, and 1/4 teaspoon pepper under chicken skin. Place on a rimmed baking sheet; roast until cooked through, about 30 minutes.
In a large bowl, whisk together yogurt, 2 teaspoons olive oil, remaining 1 teaspoon lemon zest, 1 teaspoon fresh lemon juice, and remaining 1/2 teaspoon salt.
Remove and discard skin and bones from chicken; thinly slice meat lengthwise. Add to bowl along with tomatoes and scallions; toss to combine.
In a separate bowl, whisk together remaining 2 teaspoons lemon juice and 1 tablespoon olive oil. Add mesclun; toss to coat. Divide among plates; spoon chicken mixture on top.