Steam eggplant for 10-15 minutes until desired softness. I like the eggplants to be really soft so 15-18 minutes is perfect for me. At the 10 minute mark, you will need to pour out some of the water. Then, add the garlic sauce and steam for another 3-8 minutes depending on how soft you like the eggplant. If you don't pour out the water, the dish may be watery and not as savory as you would like.