3 leafy fresh thyme sprigs
1/2 cup granulated sugar substitute – stevia
2 cups boiling water
1 cup fresh lemon juice (from 5 to 6 lemons)
1 tablespoon grated lemon zest
pinch of salt
In a medium metal bowl, combine thyme and sugar substitute. Pour boiling water over them and stir to dissolve sugar substitute. Steep for 3 minutes, then take out and throw away the thyme.
Place bowl in freezer until mixture is cool, about 10 minutes.
Take out of the freezer and whisk in lemon juice, zest, and a pinch of salt. Pour into 2 standard ice cube trays, filling each ice cube compartment to just below the top.
Freeze until mostly frozen through (1 1/2 to 2 hours). Place cubes in a food processor or blender and pulse very briefly, just until ice becomes granular. (Don't over process/blend or the dessert will be a liquid.)
Transfer ice to dessert bowls and serve immediately.