Step 1

Preheat the grill over medium-high heat and preheat the oven to 275 degrees F.

Step 2

For the slider: Coat a saute pan with oil and put over medium-high heat. Add the peppers and onions and saute until tender.

Step 3

Grill the bologna and set aside.

Step 4

Layer the pepper mixture and the bologna onto slider rolls. Arrange the sliders on individual plates alongside a dollop of mustard.

Step 5

For the beef on 'weck: Rub the roast with olive oil and sprinkle with salt and pepper, to taste. Sear on the grill, then transfer the meat to a roasting pan. Put it into the preheated oven until it reaches desired temperature. Remove the roast from the oven to a cutting board and let it rest before slicing. Fill the rolls with the beef and arrange on plates with dollop of horseradish.