Preheat oven to 375 degrees F. Grease a baking dish large enough to hold the pork chops in one layer with cooking spray. In a medium-sized bowl, combine cracker crumbs, Parmesan cheese, garlic salt, and sage; set aside. Coat each pork chop with yogurt, then dip all sides in crumbs.
Place pork chops in the greased baking dish. Bake 30-35 minutes or until cooked to your desired degree of doneness.