Mint and cumin

• 1 tsp cumin seeds
• 650 g Greek yogurt
• about 2-3

Pour the cumin seeds into a small, dry frying pan and place over a medium heat. Stir until aromatic and a shade darker, then tip into a mortar and grind to a powder with the pestle.

Put the crushed cumin seeds into a jug blender and shove in all the remaining ingredients with a big handful of ice cubes and about 1