Observe the long beans when you open to stir the mixture while cooking. If the mixture is drying up and starting to brown at the bottom but the beans are not yet tender, it means the variety of long beans you are using doesn't have enough water content. In this case, take some water in your palm and splash it into the the long bean-coconut mixture and mix well. In most cases, you'll need only 1 or 2 splashes of water.