Grilled Lemon Pepper Chicken Salad with Greek Yogurt

lbs Chicken breast

Celery stalks, chopped (about 1 cup)

Lemon, juice from half

Tarragon, dried

Vidalia or sweet onion, chopped (about 3/4 cups)

Mayonnaise, reduced fat

Lemon pepper seasoning

Salt and fresh ground pepper, coarse

Baslamic vinegar, white

Oil

Plain 0% greek yogurt