Pour the beans into a baking dish. Make sure to not fill it more than 1/5th full.
Pour enough water into the dish to cover the beans at least 3 times.
Some of the beans will likely be floating, so tap them with a spoon to make them sink.
Cover the pan with a towel and let sit overnight or for 12-18 hours.
Drain the water out of the pan.
Add more water and swish the beans in it to rinse them.
Now drain this water out of the pan.
Spread the beans evenly across the pan and cover.
Repeat steps 6-8 three to four times a day until the beans have grown approximately 1/4" - 1/2" sprouts.
Notes
You can store sprouted beans in an airtight container in the fridge for up to three days before cooking them. If you prefer, you can freeze them for 8-10 months.