Prepare a medium-hot fire in a charcoal grill with a cover, or preheat a gas grill to medium-high.
To make the patties, combine all the ingredients in a large bowl. Handling the meat as little as possible to avoid compacting it, mix well. Form into 12 equal patties to fit the biscuits, cover, and refrigerate until ready to grill.
To make the chow-chow, combine all the ingredients in a bowl and toss gently. Cover and refrigerate until ready to assemble the sliders.
To make the mustard, combine all the ingredients in a bowl and mix well. Cover and refrigerate until ready to assemble the sliders.
Brush the grill rack with vegetable oil. Place the patties on the rack, cover, and cook, turning once, for 3 minutes on each side. Transfer the patties to a plate and allow to rest before assembling the sliders.
To assemble the sliders, split the biscuits and brush the tops with the butter. Spread the mustard on the cut sides of both halves of the biscuits, top each bottom with a patty, and then an equal portion of the chow-chow. Add the biscuit tops and serve.
Makes 12 sliders, for 6 servings
Suggested Wine Pairing: Chardonnay
Patterson Watkins, Philadelphia, Pennsylvania