1. Grill peach just long enough to soften and get grill marks.
2. Meanwhile mix honey and thyme with hot water and let sit for five to seven minutes to extract flavor.
3. When the peach is ready, add to cocktail shaker with infused thyme water, lemon juice, and bourbon (if using). Muddle with a large spoon, then add ginger beer and shake (gently, because the ginger beer is fizzy and will build pressure in the cocktail shaker).