Cook the rice: rinse the rice, then cook according to package instructions. Mix the vinegar, sugar and salt in a small pan, heat gently until dissolved. Pour over the hot rice, mix carefully and let cool slightly.
Prepare the fried onions: toss the sliced onions with starch and a little salt. Fry in a pan with a drizzle of oil over medium heat, stirring often, until golden and crispy (10–12 minutes). Drain on paper towel.
Prepare the tofu: cut the tofu into cubes and coat with starch. Heat the oil in a pan, fry the tofu on all sides until golden.
Make the teriyaki sauce: mix all the ingredients in a bowl. Pour over the golden tofu in the pan, reduce to low heat and let thicken while stirring. The tofu should be coated in a shiny glaze.
Cook the warm vegetables: sauté the eggplant in oil until tender. Add the shiitake and soy sauce, cook 3–4 minutes more. Set aside.
Prepare the fresh vegetables and greens: slice the cucumber and radishes. Rehydrate the seaweed if needed. Rinse the sprouts, chop the scallions and fresh herbs.
Make the miso-lemon sauce: mix the miso, lemon juice, water, oil and maple syrup. Adjust the texture until smooth and creamy.
Assemble the bowls: divide the rice between two bowls. Arrange the glazed tofu, sautéed vegetables, cucumber, radishes, seaweed, sprouts and herbs. Top with fried onions.
Finish: drizzle with the miso-lemon sauce. Sprinkle with sesame seeds, scallions and a little lime zest if desired.