Pat meat dry with a paper towel to remove excess moisture.
Season meat generously with salt and pepper. Set Aside.
Preheat oven and put on the high broil setting.
Place meat on a lined baking sheet. Broil on top rack for 5-7 minutes per side or until you reach desired level of doneness. Let meat rest several minutes before slicing thinly against the grain and serving.
While meat is cooking, make sauce by combining all remaining ingredients. Sauce can be served as is or pureed into a finer sauce. Season to taste with salt.
Serve beef with chimichurri sauce drizzled on top. Enjoy!