Add 1 quart of water and basil to a pot, Bring to a boil

Boil for 8 minutes or until basil turns dark

Add sugar and stir until dissolved, about 2 minutes

Remove from heat and add lemonade concentrate and stir to combine

Let stand 30 minutes

Strain through a mesh strainer

Place liquid into 1 gallon plastic bag and freeze overnight

Once frozen, take out of freezer and allow to thaw for 20 minutes

Scoop slush into glass an enjoy