This never happens. I was completely stumped for a title on this one. So, the name is admittedly a bit of a cop-out — but that doesn't change the fact that this is a simple and delicious combination. Perfectly grilled brats in pillowy potato hot dog buns are topped with homemade mustard with a touch of cumin and zingy tart cornichons (instead of the usual sweet pickle relish). It works.
Preheat a cast-iron grill pan or gas grill on high heat. When hot, add the bratwursts and cook until an internal temperature of 160 degrees is reached, about 10 minutes total. Turn halfway through the grilling process to achieve char marks on both sides.
Place in the buns and top with the mustard and chopped cornichons. Devour.