Pit Beef

1 beef roast, 3-4 lbs, top round or tri tip
1 tbsp kosher salt
1 tbsp fresh black pepper
shaved white onions

Sauce: combine the following
4 tbsp horseradish
1/4 cup sour cream
1 tsp dijon
1 tsp mayonnaise

Trim the roast, coat well with salt and pepper.  Broil over a charcoal fire turning every 8 minutes until internal temperature reaches 135F.  Wrap in foil and allow to sit for 15 minutes.

Slice the roast as thin as possible across the grain.  Place on a toasted Kaiser roll and top with onions and horseradish sauce.