01 -
Clean lemons thoroughly under running water and pat them dry with a kitchen towel.
02 -
Grate the outer yellow skin of the lemons to get zest, then squeeze them to collect all the juice, removing any seeds you find.
03 -
Put the fresh lemon juice, zest, sugar and water in a cooking pot and stir until sugar melts completely.
04 -
Turn heat to medium and bring everything to a nice bubbling boil.
05 -
Lower the heat and let it cook gently for 30-40 minutes, giving it a stir now and then.
06 -
Drop a small spoonful on a cold plate - if it stays firm, it's ready. If it runs, cook it a bit longer.
07 -
Take the pot off the heat and let the jam cool down a little before pouring it into clean jars.
08 -
Close the jars tightly and wait for them to cool completely.