Step 1

In a large bowl, whisk together the lemon zest, lemon juice, sugar, and salt. Gradually whisk in the half & half, and continue whisking until the sugar is completely dissolved, 1 to 2 minutes.

Step 2

Pour the mixture into a shallow container, such as an 8-inch cake pan and cover with plastic wrap. Freeze until the mixture is solid around the edges yet still mushy in the middle, about 2 hours. Stir well, cover again, and continue to freeze until completely firm, 2 to 3 hours more. Once firm, scoop into chilled bowls to serve.

Step 3

Make-Ahead Instructions: The lemon ice will keep for about 1 week in the freezer.