Tuna Tartare With Cucumber Salad And Avocado

Ingredients

• 12 ounces sushi-grade ahi or albacore tuna
• 2 tablespoons wasabi powder
• 1/4 to 1/2 cup water
• 1 english cucumber, unpeeled, sliced paper-thin
• 2 teaspoons kosher salt
• 2 jalapeño chiles, stemmed, seeded, and julienned
• 3 red fresno chiles, stemmed, seeded, and julienned
• 1/2 medium red onion, thinly sliced
• 2 tablespoons rice vinegar
• 2 tablespoons extra-virgin olive oil
• 1/4 cup tamari
• 1/4 cup rice vinegar
• 1/4 cup mirin
• 12 slices avocado
• 2 tablespoons toasted sesame seeds