Ending an indulgent dining experience with a proper cup of coffee or espresso is an experience that's harder to find than it should be. Last year, Mercantile had us smitten with a menu and atmosphere that snagged the Best New Restaurant award. This year, we discovered the restaurant's noteworthy coffee program, which includes a walk-up counter where Union Station browsers are welcome to grab a cup. Meanwhile, lucky diners at the restaurant can complement their meal with a precisely poured cortado, pour-over or other coffee product.