1. Leaving boiled potatoes in water for too long will result in potatoes absorbing high amount of moisture and when you mix them for kabab, it will make the kabab dough watery. So, please remove the potatoes immediately after boiling (by rinsing pressure cooker in cold water to release the pressure quickly).
2. To make hung curd (thick curd), take 2 cups of normal curd in a muslin cloth and tie using a rubber band. Hang it and place a pot below to collect the dropping water. Wait until the water stops dropping from the cloth.Take kitchen paper towel and make 3 layers, place the curd with muslin cloth on it and wrap it tightly. Refrigerate the curd until all the moisture gets absorbed into paper towel for about 2 hours.