For decades I’ve sought this holy grail of bread recipes. Star bread, the American cousin of what I consider the finest bread in Italy, is the stuff of legends. Italian bakers introduced it to Springfield, Massachusetts, and a few other places in the state about a hundred years ago. Specialty Italian bakeries hooked customers on the twisty-shaped loaves, also called “horn bread” or “bolognese bread.” Those bakeries have dwindled to a handful, and star bread always sells out—often before it reaches the shelves. What makes it so special? The hard, golden brown, impossibly smooth crust has the crunch of a dry breadstick. In contrast, the soft crumb inside is fine, compact, and as bright…