Spray baking tray with your preferred cooking oil
Combine black and white sesame seeds then pour onto a flat plate.
Cut salmon into 1" cubes, then coat each piece of salmon with sesame seeds and place onto the baking tray.
Once every piece of salmon has been coated with the sesame seeds place baking tray in a preheated oven at 400 and cook for 10 mins.
Remove from the oven and allow to cool, you want to serve your appetizers just warm or at room temperature.
Lay out crackers on your platter and once the pieces of salmon are just warm to touch, add a small dollop of wasabi mayo to each cracker.
Place a piece of salmon on top, drizzle with the eel sauce and finally, once all of the appetizers are complete, sprinkle all over with scallion.
Serve immediately.