Take a big bowl - stuffing with elderberry blossoms and 2 sliced lemons - pouring cold water and cover with a plate to keep everything under water.
24 hours later - pour everything through a muslin or filter - take 1 &1/2 L juice and 1 &1/2 kg sugar - cook together - and pour into bottles.
The end result.
Pour into a glass about 3 parts syrup and 7 parts water. Kids love it.
You can also use the syrup with some white wine as an aperitif.
