Commonly called Irish moss or carrageen moss (Irish carraigín which means "little rock")
It is a species of red algae which grows abundantly along rocky areas.
Carragheen Jelly Recipe:
(to be added as a separate recipe soon)
Add 500ml cold water to a saucepan, add in 5g of carragheen moss. Boil for 20 minutes, stirring occasionally.
Strain mixture through a sieve to remove carragheen moss pieces (it's the liquid that we want).
The jelly is ready to use straight away or else you can let it cool and store in an airtight container in the fridge and use another time (keeps for weeks)
If you are using from a fridge, add the jelly to a saucepan and heat till in liquid form and it's ready for use.