Crunchy Tofu Steak and Mushrooms

Ingredients

• 600 Grams firm tofu (tokwa) (drained and sliced into 16 squares)
• 3/4 Cup Flour (seasoned with 1 1/2 teaspoons salt and 1/2 teaspoon black pepper)
• 1 Egg (lightly beaten with 2 tablespoons milk or water)
• 1 1/2 cups Japanese breadcrumbs (Panko)
• Oil (for deep-frying)
• 3 tablespoons sake (japanese rice wine)
• 3 tablespoons mirin (japanese sweet rice wine)
• 1 1/2 tablespoons Soy Sauce
• 3 tablespoons brown sugar
• 2 tablespoons Butter
• 1 tablespoon Oil
• 1/2 Cup onion
• 2 teaspoons Garlic
• 2 cups fresh mushrooms (chopped)
• 1/2 tablespoon cornstarch (dissolved in 1/2 tablespoon water)
• Salt
• 3 tablespoons green onion (chopped)