Having incorporated Quinoa into bread baking, this week I incorporated some left over from making black bean soy milk into bread. it gives a distinct taste of black beans, not as strong as its boiled n drain, but it is subtle enough for you to taste it.
So before we move on to bread thats what i did with the black beans. I soaked it overnight, added equal parts of water to the soak beans and blend it with a handheld mixer. Drain it and repeat the process 3 times. You will have black soy milk and pulps.