The original recipe came from the San Francisco Chronicle. The original recipe calls for arugula (which I love) but it's hard to find sometimes, so I switched to fresh spinach. If you can find an Italian tonno in olive oil (Bumble Bee has one in the gold can which I can easily find), then it's worth the extra money to use. However, I have used tuna in water when it was all I had in the pantry. Just drain the water and add a little olive oil to the can, since this tuna is a bit drier than the Italian version. Let it marinate for about an hour, then drain it and use. Canned tuna has never tasted so good!!! I love this recipe for a quick dinner that I can throw together out of the pantry in less than 30 minutes, and DH was surprised how good it was when he first tasted it. This is a good base recipe to add extra goodies (sun dried tomatoes, mushrooms, artichokes, black olives, capers, etc.). I look forward to reading your comments with your add ins :)