Chimichurri is lively, with loads of parsley and oregano; bracing, with garlic, crushed red pepper and red wine vinegar; and rich, from buttery olive oil — all attributes that do wonders for meatballs. Add a generous amount of the Argentinian sauce to the ground-beef mixture, then roll and sear the meatballs until crispy and browned. (You can also broil for 7 to 10 minutes.) Serve as an appetizer, with more chimichurri alongside for dipping, or make the meatballs into a meal with couscous…
