Lemon Balm Syrup

I found the recipe here, but since that site is in Dutch I’ll translate it here into English.

Pick some lemon balm (two hands full, make a cup with your hands and hold the leaves loosely). 
Rinse the lemon balm and put in a pot or glass bowl.
Boil 1 litre of water, add this to the lemon balm and leave it to infuse overnight. 
Take the leaves from the water and squeeze. Strain the liquid.
At 500 gr of sugar for every litre and heat until the sugar is dissolved. 
When all the sugar is dissolved and vapour comes from the liquid it’s time to put it into clean bottles.
NOTE: I used cane sugar and only 400 gr, downside of cane sugar is that you loose the lovely fresh green colour, as you can see when you look at the bit which did not fit in my bottles, but tastes an smells just as yummy all the same :)