I would like a mixed barbecue, for example a chicken milanesa, a fillet of 1 kilo of pork, and also 2 kilos of meat for parrila, and to flavor it, I do the following:
I add salt, soy sauce and enough garlic, and I marinate it from one day to the next, while I make a sauce that I will make after it is cooked, a spicy guacamole.
Also, pick onions half and also put them on the grill when roasting everything, and when I go to assar the meat, I add mustard to the pork and chicken, and mayonnaise to the beef, and there you have a barbecue Excellent. and of course never miss the pepper :)