Yasai Kushiyaki (Grilled Vegetable Skewers)

Ingredients

• 1/4 cup soy sauce
• 1/4 cup mirin (sweet japanese rice wine)
• 1/4 cup sake
• 1 teaspoon granulated sugar
• 1 teaspoon grated, peeled fresh ginger root
• 3 cups assorted vegetables
• Suggestions:
• Mushrooms, whole or cut into 1-inch pieces
• Bell peppers, 1-inch pieces
• Green onions, 1-inch pieces
• Eggplant or squash, 1/2-inch thick slices
• Cherry tomatoes
• 4 ounces baked tofu, cut into 1-inch pieces
• Vegetable oil
• Kosher salt, to taste
• Pepper, to taste