Place the half and half in a heavy saucepan. Sprinkle the gelatin over. Let stand for 3 to 5 minutes to soften the gelatin. Stir over medium heat just until the gelatin dissolves but the milk does not boil, about 5 minutes. Add the cream, honey, vanilla, nutmeg, and salt. Stir until the sugar dissolves, 5 to 7 minutes. Remove from the heat. Pour mixture through a fine strainer to remove any lumps. Grease 4 ramekins. Pour mixture into ramekins. Cool slightly. Refrigerate until set, at least 6 hours. Remove the panna cotta from the ramekins onto a plate. Spoon berries over the top and serve. Decorate with chocolate drizzle or honey if desired.