Beef Burger @ Butcher & the Burger By Penny Pollack February 2, 2012, 11:44 am The caramelized onions underneath this grass-fed beef burger @ButcherBurger were so slippery, the patty almost slid off the bun. Added to the fun. BUTCHER & THE BURGER: 1021 W ARMITAGE; 773-697-3735 Tags: What Penny Eats