Step 1
In a cocktail shaker or large measuring cup, using a muddler, mash half of strawberries and half of mint into a chunky paste. Add simple syrup and continue to muddle until strawberries are completely broken down.
Step 2
Fill a pitcher with ice, then strain strawberry syrup through a fine-mesh sieve into pitcher. Add wine, soda water, St. Germain, and lemon juice and stir to combine.
Step 3
Stir in lemon slices and remaining 8 ounces strawberries and 1/2 cup mint.
1 lb. strawberries
1 cup fresh mint leaves
2 oz simple syrup
1 bottle Sauvignon Blanc
1 1/2 cup soda water
2 oz St. Germain