I approached this recipe with a little trepidation, not sure of how I would feel about the orange mixed with the tuna.( I think using oranges is a Sicilian trait. ) I was pleasantly surprised. I doubled the recipe, except I only used 1 large orange. The instructions did not indicate it, but I drained the tuna (reserving the oil) and also drained the olives. I ended up using the reserved olive oil from the tuna to mix in to the salad. I chopped the onion, rather than sliced it and I did use lots of freshly ground pepper. I let it all blend together for a few hours, and it made a wonderful lunch for me all week long! Thanks for sharing this unique recipe!