This appetizer is a favorite among my very picky family. I am not even a fan of fish, yet I will completely devour this dish. It is a light, healthy dish that can either be made for a snack, an appetizer, or an entire meal. You can make it as spicy or mild as you please... it is still scrumdiddlyumptious!
Cut the tuna into ¼-inch dices and place in a large bowl. In a small bowl, combine the olive oil, lime zest, lime juice, wasabi, soy sauce, tabasco, salt and pepper.
Pour the mixture over the tuna, add the scallions and jalapeno pepper. Mix gently, but well. Pour the toasted sesame seeds in, if you are using.
Do not make this too far ahead of the event because the avocados will start to turn brown and murky. But, definitely allow for the final mixture to sit in the fridge, covered, for about an hour to be sure that the flavors are blended. Serve the tartare on Carr's sesame crackers or endive leaves.