Add lemon, mint, sugar and water to a pan. Over medium heat, bring to a boil, stirring to dissolve the sugar.
Let boil for 5 minutes.
Turn off the heat and let it steep for 1 hour.
Strain out the mint and the lemon and store in a lidded bottle in the fridge.
Video
Notes
This will keep for about a month in the fridge. Use in cocktails in place of regular simple syrup or to add extra mint and lemon flavor. Lovely stirred into tea!