How to Make It
Combine ice and salt in a gallon Ziplock bag; set aside. Combine half and half, sugar, vanilla, and strawberries in a quart Ziploc bag; seal tightly. Place quart bag inside gallon bag; seal. Cover gallon bag in a kitchen towel. Shake vigorously until half and half mixture is thick and chilled, about 7-10 minutes. Remove from bag to serve.