At our 2018 Summer Festival at TOIRO, we made hundreds of onigiri (rice balls) with freshly made rice in our double-lid donabe rice cooker, Kamado-san, and served with these summer-theme toppings. We were so happy that many of our guests kept coming back to try more. The Walnut Miso includes Fig Vinegar so it has a refreshing and soft acidity. The Slow-Roasted Tomato is rich in umami and the Smoked Soy Sauce adds an extra layer of complexity. The Roasted Corn and Yuzu-Kosho Mayo has a beautiful, sweet corn flavor with an aromatic heat from the Yuzu-Kosho. These toppings are also great to serve with cold tofu or grilled meat. We hope you will try all three kinds. The amounts of these toppings in this recipe are more than enough to make the suggested servings, so you can keep any leftover for another use.