1. Bring juice to a boil in a shallow pan over high heat. Leave uncovered and decrease heat to medium-high so mixture reduces by approximately 1/3. Cool in stainless-steel bowl set on ice.

2. Once juice is cool, mix in breast milk or formula.

3. Freeze in home ice-cream machine following the manufacturer's instructions. If you don't have a home ice-cream machine, you can make this recipe "granita-style": freeze in shallow container and, as it freezes, break up ice crystals by fluffing with fork, approximately every 15 minutes.

Yields 6 oz. (About 4 servings)