1. Wet your hands with a little bit of water. Take one full spoon of rice and adjust the shape to a rectangle using your finger until it is about 5 by 2 cm.
2. Pick a slice of fish and spread a small amount of wasabi on it using your free hand.
3. Place the rectangular rice on top of the fish. Form a little bowl with your hand holding the sushi, and use your other hand to slightly press the rice onto the fish.
4. If the fish doesn't stick, wrap a seaweed strip around it. To make it stick better, moisturize the ends of the strips with a water drop.
5. Garnish with sesame seeds. Lastly, serve the sushi with a small sauce tray for soy sauce, wasabi, and Japanese pickled ginger.

Please note: raw fish can only be eaten while it is fresh. When in doubt, cook the fish before serving.