"River Twice in East Passyunk messes around with plenty of koji butter, golden trout roe, and firefly squid on their four-course tasting menu. But they also make Philly's best burger as an add-on element on Mondays only. It's straightforward—as a great burger should be. Two beef patties with crispy edges and perfectly pink middles are topped with cooper sharp, pickled red onions, a slathering of everything-seasoned mayonnaise, all between toasted sesame seed buns. All thriller, no filler." - candis mclean, alison kessler