I use this in my blog, Sunday Dinner at Jonathan's, check out the following link for the whole meal: http://sundaydinneratjonathans.wordpress.com/2014/09/15/steak-with-chimichurri-sauce/

• ⅓cup olive oil
• ½ cup parsley, chopped
• 1 tablespoon red wine vinegar
• 1 clove garlic, chopped
• ¼ teaspoon crushed red pepper
• Kosher salt and black pepper
• 1 ½ lbs flank steak

1. In a small bowl, combine olive oil, parsley, vinegar, garlic, red pepper, pepper, and ½ teaspoon salt, set aside
2. Season steak with ½ - to ¾ teaspoon salt and ¼ to ½ teaspoon pepper
3. Grill steak to desired liking. Let rest 5 minutes before slicing
4. Slice the steak. Plate all sides and top steak with sauce