If you are having a dinner or lunch party and don't feel like cooking for a lot of people, I recommend Jackie Guiloff's catering firm. I attended a dinner party in Lo Barnechea recently (catered by Guiloff's company) and I absolutely loved the food, which is much more sophisticated than most anything you get in Chile. The desserts were divine!
I am holding a dinner party soon and I'm definitely going to use them. Here's the website:
http://www.jackieguiloff.cl/


