Is white bread about to make a comeback on school lunch menus? After complaints about taste and costs, the Trump administration rolled back a rule that required foods like pasta and bread be made with whole grains. The cafeteria directors who lobbied for the change say they just want greater flexibility to serve foods like white bread — which are more processed and have less fiber — when whole grains don’t work. In Vermont, the relaxed rule means white rice will be served with beans again. In Oregon, macaroni and cheese may return. And in South Dakota, students may notice...