Combine wasabi, ginger, vinegar, soy sauce, green onion and sesame seeds in a small jar and shake well. Add sesame oil and shake until combined.
In a large bowl, mash avocado cubes with a fork or mortar and pestle.
Add lime juice slowly to make a smooth base. Once combined, grate jalapeno into the bowl and mix.
Cut the cucumber using a spiralizer, julienne, or mandolin to create long strips.