Soak Green Gram or hesara kalu in sufficient water. All the gram should be completely soaked. Make sure there is enough water since they bloat and use up all the water. Soak it overnight. Drain and rinse with water several times. Place it in big bowl as shown below and a colander which has all the beans. Keep it in a warm place the next day. I usually keep it overnight on the dinning table. When you wake up the next day, the beans are all sprouted and ready to be eaten.
Here is a picture of how I sprout them.
Here is a link on my site for sprouted green gram sabzi and Usli