This wasn't a road trip from Philadelphia to North Jersey, it was a pilgrimage.  

White Manna's burgers, lovingly called "Sliders" by those who grew up on them, start off as balls of ground beef dropped on the grill - smaller balls for single burgers, larger balls for doubles.  The grill master, who also functions as emcee and social director, flattens them with a spatula and covers them with fresh onions.

One flipped the bun goes on top of the cooking burgers, sopping up the juices.

They sure ain't pretty, but I'm not sure there's a better burger, anywhere.