Recipes: Grilled steak tacos with cilantro chimichurri sauce

Preparation:    Preparation time: 60 mins  Cooking time: 20 mins  Serving: 8 Ingredients:   Steak and Marinade 2 lbs Flank Steak (or pounded skirt steak) 1 sliced sweet onion for grilling (optional) Juice of 1 orange Juice of 2 limes 1/3 cup soy sauce 1/3 cup olive oil 1/2 teaspoon sugar ( optional) 4 smashed, chopped garlic cloves 1/2 cup chopped cilantro (stems ok) sliced sweet onion (optional) for...