How to Make It
Preheat the oven to 350°. Toast the baguette slices on a large baking sheet until light golden and crisp, about 15 minutes. Let cool.
In a small bowl, mix the mayonnaise with the wasabi paste and season with salt and pepper.
In a medium bowl, gently mix the tuna with the soy sauce, avocado, cucumber, scallion and ginger. Spoon a dollop of the wasabi mayonnaise onto each toast, top with the tuna tartare and serve.