Pour entire bottle of wine into a large glass dish. If desired, add a dash of grenadine. Place in freezer for at least 6-8 hours or overnight. Mixture will not completely freeze because of the alcohol.
In a small saucepan, make a simple syrup with sugar, water and mint. Bring to a simmer and stir until all the sugar has disolved. Let cool, pour into a container and place in the fridge until time to assemble your beverage.
Place serving glasses in the freezer to chill.
Remove mint leaves from simple syrup.
In a blender, add 2-3 ice cubes, 2 TBSP of simple syrup or more to taste, the frozen fruit of your choice and the frozen wine. Blend until frosty and slushy.
Garnish with a thinly sliced fresh peach or cherry and a sprig of the remaining mint.
Serve immediately.
Leftovers can be stored in a zip lock bagged ( we recommend double bagging) for up to one month.