Say "lettuce wrap". The chopped cherry peppers bring most of the sugar (2g carbs, 2g sugar); say "no cherry peppers" for about 3g carbs, 1g sugar. Skip BBQ sauce (16g carbs, 14g sugar) and honey mustard (4g carbs, 4g sugar). Shake Shack's guide doesn't list ketchup, so its numbers aren't verified here.