How to make yam spareribs soup

Put spareribs into pot with water,and boiling.

Extract spareribs from boiling water.

Prepare a patch of ginger and chopped green onion.

Find a casserole.

Add water,ginger and spareribs into casserole,and start boiling.

Buy a yam like this.

Remove the peel of yam.

Then cut it off.

And cut them into slices.

Add about yam after boiling 6 minutes.

Add about a teaspoon of salt.

Spill chopped green onion finally.