Combine Soy sauce, mirin, crushed garlic and ginger in a bowl. Slice your eggplant thinly and into small pieces. Toss eggplant in hot pan (I use a spray oil like Pam) with the sauce mixture. Sauté at a medium heat until very tender, about 10 minutes. Add a little water to keep the veg moist if necessary. Great as a side dish for fish or chicken. Add diced medium firm tofu or any other protein for a very simple, quick meal.