Typically made during the winter holidays with day-old bread or bread sticks, this cheese soup-stew from northern Italy is filling and satisfying, the ultimate comfort food on a cold night.
Bring stock to a boil in a saucepan and remove from heat. Grease bottom of a 3-qt. high-sided skillet with 1tbsp. butter. Break bread sticks into 2½″ pieces. Put 1 layer of bread sti