I ran across this the other day, while looking for rice ball recipes. This isn't excatly what you're looking for as it uses mung beans, but maybe you could just substitute the type of bean? PS I'm trying to find a source to buy adzumi beans locally, maybe I should try growing some! Are they difficult to grow?

Here is a link that might be useful: Fried Glutinous Rice Balls

Here's the one I want to make.

Baked Rice Balls with Teriyaki Dip

1/3 c adzuki beans
½ c brown rice
2 tsp grated fresh ginger root
1 ¼ cup water
2 tsp lemon juice
Flesh from 2-3 umeboshi plums or 1-2 tsp umeboshi paste
2-3 T sesame seeds
Salt and pepper to taste

For the dip
3 T shoyu or tamari
3 T mirin

1. Cover the beans with water and bring to a b oil, then reduce the heat, half cover the pan and simmer for 45 minutes, or until tender. Drain.

2. Put the rice and ginger into a sauce pan with the measured water. Bring to a boil, then reduce the heat, cover the pan and allow to cook over a very gentle heat for 30-40 minutes, or until the rice is tender and all the water has been absorbed.

3. Put the rice into a food processor with the beans, lemon juice, umeboshi and some salt and pepper and whiz to a thick mixture that holds together. .

4. Put the sesame seed onto a large plate, them break off large marble-size pieces of the rice mixture and roll them in the seeds to form 18 balls. Place the rice balls on a baking sheet and bake in a preheated oven, 350 degrees, for 20 minutes, or until crisp on the outside.

5. To make the dip, mix the shoyu or tamari with the mirin in a small bowl and serve with the rice balls.