Luau Pork Teriyaki

Ingredients

• 1 1/2 lb whole pork tenderloin
• 1 cup sliced pineapple in syrup
• 1/4 cup finely chopped green onions
• 1/2 tsp ground ginger
• 1/4 tsp garlic powder
• 1/2 cup tamari soy sauce
• 1/2 cup sake or dry sherry
• 1/4 cup sesame oil
• 1/4 cup rice vinegar
• 1/3 cup brown sugar, packed
• 3 cloves garlic, minced
• 1 3-inch piece fresh ginger, grated
• 1 tsp wasabi powder
• 1/2 cup sliced green onion