Deli roast beef is an easy way of serving beef at a party without having to do any cooking! I love layering it into toasted slider buns and topping with a quick Argentinean-style chimichurri herb sauce you can make right in the blender.
For the chimichurri sauce:
Combine parsley, cilantro, garlic, paprika, red pepper, vinegar, lime juice, salt, pepper and olive oil in a blender or food processor and puree until smooth.
For the sliders:
Spread bottoms of slider buns lightly with mayo. Layer on several slices of roast beef. Season with a pinch of salt and pepper, then top with a generous spoonful of chimichurri sauce. Add bun tops and serve with additional sauce on the side.