Optional: heat a grill or grill pan to high and grill the peach slices for 2-3 minutes per side.Fill a rocks glass with ice. In a cocktail shaker or glass jar, muddle the peach slices, thyme, and lemon juice, squishing everything to release the peach juices. Add the peach jam and bourbon and stir/shake to combine. Pour/strain into your prepared glass. Top off with ginger beer, then gently stir to combine. Add thyme or basil. Enjoy!To Make a Mocktail: omit the bourbon and use 1/4 cup apple cider with 1/4 teaspoon vanilla extract.