We have been blessed by family and friends that travel and bring back gifts. In this case it was olive oil. My mom went to Greece (with my nephew) and Portugal (with my niece) and an employee of Bob's went to Italy. We've been waiting for a night to have all/most of us together to taste test the oils and see if there was a difference. Wow, was there, at least for some of us. Bob said that he tasted no difference between them. Whitney and I liked the Greek oil best.
Our method - I bought some soft French bread from the grocery store and poured the oils into dishes. It wasn't a blind tasting, we knew what we were having. It was just the bread and olive oil.
It was a fun evening. We rounded out our dinner with roasted vegetables (cauliflower, mushrooms, and zucchini) and pepper-pepperoni salad.