Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a mixing bowl, whisk together the miso paste, grated ginger, honey or maple syrup, soy sauce, sesame oil, rice vinegar, and minced garlic until smooth to create the glaze.
Place the sliced eggplant rounds on the prepared baking sheet, and brush each slice generously with the miso ginger glaze on both sides.
Bake in the preheated oven for about 25-30 minutes, flipping halfway through, until the eggplant is tender and caramelized. Make sure to baste with any leftover glaze for extra flavor.
Once done, remove the eggplant from the oven and let it cool slightly.
Serve the eggplant on a platter, sprinkle generously with sesame seeds and chopped green onions for a finishing touch.
Notes
For a gluten-free option, use tamari instead of soy sauce.