Summer Drinking: Mint "Limonata"

First made these a couple of weeks ago, but kept forgetting to add the recipe (from CHOW). Substituted San Pellegrino for the soda water. Raves all around - a good combination of effervescence, sweetness and tartness (next time, I may add a squeeze or two of lemon juice to increase this).

• Crushed ice (we didn't have any, alas)
  
• 2 oz limoncello
• 1 oz. vodka
  
• 2 oz. soda water (used San Pellegrino mineral water instead)
  
• 2-3 medium mint leaves, torn in half

Put ice in a shaker-type container. Add limoncello and vodka; shake to combine.

Add soda water/sparkling mineral water to shaker and stir to combine. Pour into a rocks glass and serve topped with the torn mint leaves.