I have never made my own from scratch but if you go to a Chinese/Asian supermarket, you should be able to buy the soup base. They have a myriad of different flavours to choose from and whatever packet you buy, you open it and put the stock in a pot of boiling water and that's it. You should be able to buy the thin slices of meat used for hot pot in the same supermarket and you can choose what other vegetables you want to put in.