Make the blueberry purée

• Combine the blueberries, water, simple syrup and lemon juice in a saucepan.
• Cook over medium heat, stirring and mashing the berries, until the fruit has broken down and the mixture has thickened.
• Strain through a sieve if you want a smooth purée, then let it cool completely.

Whisk the matcha

• Sift the matcha powder into a bowl to remove any lumps.
• Add the hot water and whisk vigorously until smooth and frothy.

Assemble the latte

• Spoon the blueberry purée into the bottom of a glass.
• Fill the glass with ice cubes.
• Pour in the milk, then slowly pour the matcha over the top.
• Stir before drinking.