Step 1

Rinse the barley in a sieve under cold running water

Step 2

Zest the lemons

Step 3

Put the barley, sugar and lemon zest into a saucepan

Step 4

Pour over 1.2 litres of boiling water - bring the pan to the boil then reduce the heat to a simmer, put the lid on and cook for 45-60 minutes (check barley packet for exact cooking times)

Step 5

Once cooked - remove the pan from the heat and leave to cool down.

Step 6

Juice the lemons

Step 7

Then pour the barley water through a sieve into a jug

Step 8

Stir in the lemon juice and then pour into a clean, sterilised bottle and store in the fridge

Step 9

Use within 2 days.