In shallow dish, stir bread crumbs, 1/4 teaspoon of the salt and the garlic powder. In another small bowl, beat yoghurt, egg and mustard with whisk. Dip chicken tenders one at a time into yoghurt mixture, then roll in bread crumb mixture. Arrange in single layer on baking sheet. Arrange broccoli around chicken in single layer on baking sheet. Spray chicken and broccoli lightly with cooking spray, then sprinkle with remaining 1/4 teaspoon salt.