Asian Burgers

Ingredients

• 2 tablespoons soy sauce
• 1 tablespoon sesame oil
• 1 can (8 ounces) sliced water chestnuts, drained and chopped
• 1 cup bean sprouts
• 1/2 cup finely chopped fresh mushrooms
• 1 celery rib, finely chopped
• 4 green onions, finely chopped
• 1 teaspoon pepper
• 1/2 teaspoon salt
• 2 pounds ground beef
• 4 teaspoons canola oil
• 1/2 cup mayonnaise
• 1 tablespoon prepared wasabi
• 8 sesame seed hamburger buns, split
• 3 cups shredded Chinese or napa cabbage