Singer John Legend, center, ordered everything on the menu of Crystal’s Comfort Food in Middletown, owned by Steven, left, and Crystal ‘Chef Cryss’ Ashby. A Middletown soul food eatery best known for its wings catered a meal for popstar John Legend Wednesday.  Crystal’s Comfort Food is no stranger to serving celebrities. They’ve served performers D.C. Young Fly of MTV’s “Wild …