Preheat oven to 375 degrees. Place peach halves cut side up in a glass baking dish (I used a glass loaf pan, but any small baking dish will work). Drizzle peaches with honey and sprinkle with thyme leaves. Pour 2 Tablespoons of water in the bottom of the dish. Cover with foil and roast for 30 minutes. Allow peaches to cool. Remove and discard skin, but reserve peaches and any juice at the bottom of the dish.Place roasted peaches and any juices from the roasting dish in the bottom of a cocktail shaker and muddle with a cocktail muddler or the back of a wooden spoon. Add bourbon, simple syrup and ice. Replace lid and shake until chilled. Place two large ice cubes in two high ball glasses. Strain cocktail through lid into a small mesh sieve to 'double strain' the cocktails into the highball glasses. Top off the glasses with club soda or ginger ale. Garnish cocktails with fresh peach slices and thyme sprigs. Serve and Enjoy!