Trim off the root end of the lemongrass. Slice the lemongrass thinly, crosswise, from the bottom up to the 5-inch mark. Discard the rest or use it for garnish as shown.
Put the lemongrass slices into a small pot or saucier along with the water and set it over medium heat. When the water boils, reduce the heat immediately so it barely bubbles around the edges. Let the water simmer gently for one minute. Remove the pot from heat. Immediately whisk in the honey; blend well. Cool.
Strain the cooled syrup into a blender (preferably high-speed such as Vitamix). Add the salt, lime juice, and ice. Blend on high just until the mixture turns slushy.
Serve immediately.
Recipe by SheSimmers at https://shesimmers.com/2013/06/lime-honey-lemongrass-slush.html