Peel lemons removing the zest and white parts. Chop them roughly and put in a large bowl.

Add in rosemary sprigs and sprinkle sugar over them. Let them sit for about 5 minutes. This will help the lemons to release juice.

Using your hands, squeeze the lemons in batches. Transfer the juice into a jug using a strainer.

Pour 1 cup of water on the squeezed lemon pulp and wait for 5 minutes. Squeeze them in the same way and transfer the juice into the jug.

Add in the remaining 2 cups of water and mix well. Leave the rosemary leaves in the jug and chill at least for an hour.

Pour ¼ cup vodka to each serving and pour lemonade (1 cup) over it.

Garnish with lemon and lime slices and rosemary sprigs.