Tuna or chicken antipasto is a favorite at Puerto Rican parties. It is usually served with savory crackers or over toast at family reunions. This recipe is very easy to prepare, so it's perfect for your reunions or birthday parties. All you have to do is cut the vegetables into small pieces. You should be able to eat it in one or two bites. You can also give it a personal touch by adding more vegetables. Personally, I like changing the usual recipe by using small pearl onions to give the dish a nice presentation.