1. In a cocktail shaker bottom, place your mint leaves. Place a muddler in the glass and press down gently until you begin to smell the mint.
2. Transfer the muddled mint to 2 rocks glasses. Fill the glasses with ice.
3. In the same shaker, add the strawberry jam, vodka, grenadine and several ice cubes. Shake vigorously for 15 seconds.
4. Strain the jam mixture into the rocks glasses over the ice.
5. Top each glass with soda water and garnish with mint leaves.