Place the halved strawberries into the blender jar.
Add the ice cubes to the blender over the strawberries.
Pour in the balsamic vinegar and sprinkle the sea salt over the mixture.
Secure the lid on the blender and blend on high until the mixture is smooth and icy, about 30-40 seconds.
Pause to check the texture—if it’s too thick, add a splash of water or juice and blend briefly again.
Pour the slushie into glasses, jolts of icy pink ready to serve.
Optionally, garnish with a fresh strawberry or a sprig of mint for visual appeal.