Wash and cook the rice using a rice cooker. If you’re using the stove, I would recommend searching how to cook rice on the stove.
Cut off the end of the eggplant and slice it in half lengthwise. Then, slice each piece in half lengthwise again. Now you have 4 pieces of eggplant.
Slice each piece diagonally both ways to create a grid-like pattern. Be sure to only slice halfway through the piece as we want the eggplant to be intact. Transfer to a plate that can fit in your steamer.
Next, we’re going to steam the eggplant slices. You will need a steamer or a double broiler for this. Fill the bottom pot with about 2 inches of cold water. Place the plate of eggplant on the second layer and cover with a lid. Turn the stove to high heat.
When steam starts coming out from the lid, set a timer for 15mins and turn the stove to medium-high. Once the timer is up, remove the lid and gently poke an eggplant slice to check if it is soft. If not, add another 5mins. Remove from the heat and take off the lid for ventilation. Allow the eggplant to cool for 5mins.
Meanwhile, make the glaze: combine the miso paste, maple syrup, soy sauce, garlic, water and chili powder (if you're using) into a small bowl. whisk to combine.
Transfer the cooked eggplant onto a baking sheet. Brush with the glaze and bake for 10mins at 400ºF.
Serve with the cooked rice, green onion and sesame seeds!