French Onion Soup @ Bistro Voltaire By Penny Pollack January 31, 2012, 4:29 pm Beefy broth stocked w/soft onions, blanketed by a giant crouton & brûléed cheese @BistroVoltaire. What’s not to like? BISTRO VOLTAIRE: 226 W CHICAGO; 312-265-0911 Tags: What Penny Eats