Yellowfin Tuna Burger with Japanese Cucumber Relish & Wasabi Aioli

Ingredients

• 2 teaspoons wasabi powder
• 1 teaspoon orange juice
• 1 teaspoon lime juice
• 3 tablespoons pickled ginger, chopped
• 1 cup plus 2 tablespoons mayonnaise, separated
• 1½ cup japanese cucumber thinly sliced crosswise
• 1 red onion, half cut into rings and the other half cut into ¼‑inch dice, separated
• ¼ cup rice vinegar
• 1 tablespoon sugar
• ½ teaspoon salt
• .75 pound yellowfin tuna, roughly chopped
• ½ tablespoon asian chili paste
• 2 tablespoons soy sauce
• 1 teaspoon sesame oil
• ¼ cup panko breadcrumbs
• salt
• pepper
• 2 whole wheat buns, lightly toasted
• canola oil for saute pan
• alfalfa sprouts, to taste