1. In a food processor, blend lemon juice, Sloe gin, sugar, and cracked ice, using stir blade for about 8- 10 seconds.
2. Strain the Sloe Gin Fizz in 10 ounce cocktail glasses over 1-2 ice cubes.
3. Stir in carbonated water.
4. Serve Sloe Gin Fizz after garnishing with mint.