Buffalo Chicken Strips

Blue Cheese Dip:
2/3 cup nonfat plain yogurt
2 tablespoons reduced−fat mayonnaise
2 ounces crumbled blue cheese
3 tablespoons finely chopped scallions
1/4 teaspoon coarsely ground black pepper
Chicken Strips and Celery Sticks:
1 teaspoon vegetable oil
1/2 pound skinless boneless chicken breasts, cut crosswise into
1/4−inch strips
1/4 teaspoon salt
2 teaspoons butter
1 tablespoon Frank's original hot sauce
5 celery stalks, cut into 3−inch sticks