Thought I'd post this recent one too. 2 lbs skirt or thin sliced round (I like bottom round) juice of 3 oranges and 4 limes (keep the rinds for later) 5 tbsp of soy sauce 3 tbsp of vegetable oil 5 tbsp red wine vinegar 1 sliced white or yellow onion 4 smashed cloves of garlic 1-2 tbsp sugar black pepper to taste. put it all together the day before and marinate in zip lock bags overnight. Add the orange and lime rinds to the bags. If the meat isn't covered, add some orange juice next day cook over charcoal w mesquite chunks, serve w warm tortillas and whatever else makes you happy.