Lots of vegetables are deep-fried and marinated in dashi based soup. This type of dish is often called age-bitashi. It's usually served chilled, so it's a good dish to make during the hot season. You can use a variety of colorful vegetables for this dish. As deep-fried vegetables are marinated in soup, they aren't so oily. It's simple but makes a good main dish.
Deep-fried and Marinated Vegetables
Photo © Setsuko Yoshizuka, licensed to About.com, Inc.