Grilled Chipotle Skirt Steak
Cook time for skirt steak about 8 minutes; flank steak 12-14 minutes
Use unseasoned tomato puree or crushed tomatoes, not tomato sauce. Tomato sauce is usually seasoned and high in sodium.
Flank steak is thicker than skirt steak, so score flank steak with a sharp knife so meat absorbs more marinade. Flank steak also has less fat than skirt steak.