Sesame Balsamic Tuna

Bahan-bahan (2 porsi)

• Two 6-ounce (½-inch) tuna steaks
• ½ cup balsamic vinegar
• ¼ cup dark sesame oil
• 2 tablespoons freshly grated ginger
• 2 tablespoons chopped fresh cilantro
• 2 whole green onions, (chopped)
• 4 teaspoons granulated white sugar
• 2 tablespoons dark sesame oil
• 8 ounces mushrooms, (sliced)