1. Prepare the Tare (dipping sauce): Combine koikuchi soy sauce, mirin, sake, grated garlic, grated ginger, sesame oil, granulated sugar, and toasted white sesame seeds in a bowl. Grate the apple and add it to the tare. Mix well and set aside.
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2. Prepare the Beef: Slice the Beef short plate into thin, bite-sized pieces if not already pre-sliced.
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3. Prepare the Vegetables: Slice the Onion into thick rings. Slice the Green bell pepper into large pieces. Remove stems from Shiitake mushrooms. Slice the Eggplant into thick rounds.