Mix the first five ingredients in a food processor until you have a fine blend. Add the next three ingredients and continue to process. Add pinto beans and brown rice and process just enough to blend, not pulverize. Pour entire mixture into a large bowl, and add the cornmeal and baking powder. Stir. The mix should be about the consistency of cornbread batter. If itís too dry add the liquid from the pinto beans. If there isnít enough liquid, add water. When you have the desired consistency, pour into a 13 x 9 baking pan.