Saw this idea today on thekitchn.com. I can't wait to try this out and to share with my mother-in-law in Chile. Just remember to serve each topping on its own plate and with own serving utensil. And it's always a good idea to let allergic individual help themselves first to avoid possible cross contamination. And when it comes to prepping the ingredients, keep cross contamination in mind if you have an allergic guest or family member.