A little secret to make this go even faster..........freeze your fresh squeezed lemon juice in an ice cube tray, then drop two cubes in with the rest of the ice for this recipe.
2-3 tablespoons fresh lemon juice
2 cups of ice
1 dropper full of liquid lemon stevia (or plain stevia, lemon gives it more flavor)
BLEND and serve. You notice I am using a VitaMix, you will have to make this in small batches if your blender doesn't handle ice chipping well.