Your wish is my command Mossy!
To make approx 2 litres lemon cordial:
12-18 UNWAXED lemons (depending where you are - Spain has the juiciest ones! The ones in the UK are currently FROM Spain but not as juicy.)
580g granulated sugar
Water
Large saucepan (3 litres or a bit larger)
1) Zest 6 or 7 lemons. I use a potato peeler but not one of the swivel ones, mine is like this:
Put the zest in a bowl and place to one side.
2) Juice the zested lemons into a measuring jug.
3) Half fill the saucepan with water and bring to the boil. Place 6 lemons in the saucepan and boil for ONE MINUTE ONLY! Any more and they will disintegrate when you juice them! How do I know this? You can guess... The water will become yellow-tinged, this is good. It takes on the essential oils and they colour it.
4) Remove the lemons from the boiling water and leave until cool enough to handle (5 to 10 mins).
5) Juice the boiled lemons into the measuring jug. You are aiming for a total of 750ml lemon juice. If you are a little short, you can top up with some of the lemon-infused water but not too much, not more than 50ml or so.
6) Keep 750ml of the lemon-infused water in the saucepan. Add the lemon zest and the 580g of sugar, and heat on medium, stirring often so the sugar dissolves, until it comes to the boil.
7) Add the 750ml of lemon juice and bring back to the boil. Boil for 1 minute to sterilise it.
8) Remove from the heat and leave to stand for 15 minutes.
It will look like this:
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9) Strain into a heat proof jug - it'll still be pretty hot at this stage but you can't leave it on the lemon zest any longer or it'll get bitter
10) Dilute 1 part cordial to 4 or 5 parts water. You will need to experiment with this to see what strength you like it, and every batch will be slightly different because lemons are individuals! Keep the cordial in the fridge.
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If you have any lemon-infused water left over, you can freeze it into ice cubes. It'll probably go cloudy, that's normal.
Here are what I refer to as "boiled goldfish":
View attachment 727957
Any questions shoot me a PM! I think it's clear enough but I've done it loads of times so I don't even look at the recipe any more. You can vary the quantities too. In Tenerife I was doing 900ml lemon juice, 900ml infused water, 700g sugar. This is the same proportions, today's one is pretty much 5/6 of the Tenerife size.