To prepare chimichurri sauce, place garlic in food processor container. Cover; process until finely chopped. Add remaining sauce ingredients. Cover; process until well blended. Remove and refrigerate 1/4 cup sauce for serving. Place beef strip steaks and remaining sauce in food-safe plastic bag; turn steaks to coat. Close bag securely and marinate in refrigerator 15 minutes to 2 hours.
Remove filets from marinade; discard marinade. Pat steaks dry with paper towels. Place filets on grid over medium, ash-covered coals. Grill, covered, 11 to 14 minutes (over medium heat on preheated gas grill, 11 to 15 minutes) for medium rare (145°F) to medium (160°F) doneness, turning occasionally.
Serve filets with reserved chimichurri sauce.
Servings 0