• 
  1 big piece of ginger
• 
  1 bio-lemon
• 
  1 level teaspoonful of citric acid
• 
  200 grams of cane sugar
• 
  Clean the ginger and cut it in small pieces
• 
  Press the juice from the lemon
• 
  Add all ingredients except the water in a jar
• 
  2.5 liters of water
• 
  Boil the water and pour over the ingredients
• 
  Leave for 4 days
• 
  Filter
• 
  Fill into bottles