Cut the guava in round thin pieces.Put the in a pan and add water which cover the all pieces of guava.

Boil in slow heat for 15 minutes.check the skin of the piece easily come out

Now take a muslin cloth and pour whole the guava on it.keep the water and discard the other wastage.

Put this guava water in a pan.Add sugar to it. Boil till become thick and bubbles come out.to check the jelly is done take a spoon and take the syrup into it and down it if it is set by dropping then it is done

Then it is done.Add citric acid and boil for 1 minute.
Pour this syrup in a jar and keep for setting It takes time to set may be 4 to 6 hour