Carefully dice the tuna and avocado into 1/4 inch cubes. Add the remaining ingredients and gently mix to combine so as to not smash the tuna and avocado. Lightly press into a small bowl and chill for several minutes while you prepare the sesame crackers.
The sesame crackers are large round crackers about 8 inches in diameter that can be found at any Asian market; they come in a few different flavors, and some even have tiny dried shrimp baked into them. Straight from the package they are thin and translucsent. But when microwaved, they become very light and fluffy, and are the perfect way to serve your tuna tartare. On a microwaveable plate, microwave one cracker at a time for two minutes on high, or until cracker begins to puff up. Break into large pieces. Repeat with remaining crackers.
Take your bowl of tartar from the fridge, turn the bowl over onto a plate, and remove the bowl. Now take your pieces of sesame crackers and around around the tartar on the plate. Serve immediately.
Original Blog Post: http://www.curlygirlkitchen.com/2011/05/sushi-and-poker-night.html