It can be made by boiling, steaming, pressure cooking, or microwaving pulses in water. These dim sum can be easily cooked by steaming or microwaving. Also, microwaving meat before cooking may reduce HCAs by 90%. However, microwaving potatoes only reduces the alkaloid content by 15%. Microwaving the pie will negate these qualities, making the pie pastry soft. Vitamin becomes inactive due to microwaving or other forms of heating. Similarly, porcelain with thin metal films can also be destroyed or damaged by microwaving.