Start by making the simple syrup. This is easily done by heating, for example, 0.5 dl sugar and 0.5 dl water. Stir until the sugar is dissolved.
Then, place all the ingredients in a blender and blend until it turns into a slush. You may want to adjust the amount of mint based on your preference and the flavor intensity of the mint leaves you're using. This can vary greatly.
Pour it into a glass, garnish with a lime slice and some mint.