Place the peach halves cut side down on the grill. Cook for 4-5 minutes and then flip cooking for another 4-5 minutes. Remove from the heat and set aside.
Making the whipped feta
In a food processor or blender add the feta, Greek yogurt, mint, lemon zest, lemon juice, and red pepper flakes. Blend until everything is combined and slowly drizzle the olive oil into the food processor. Keep blending until nice and light. Place into a mixing bowl, cover and refrigerate until use. Can be made up to a day in advance.
Making the bourbon vinaigrette
In a blender or food processor add all of the vinaigrette ingredients together and blend until smooth.
Assemble the salad
Cut the peaches into smaller slices.
Spread the whipped feta onto the serving dish. Top with sliced peaches and then drizzle the vinaigrette on top. Garnish with additional chopped mint if desired.