In a medium-sized bowl, add the raspberries, sugar, orange zest, orange juice, and a pinch of salt.
Stir until the raspberries are coated.
Let the raspberry mixture sit for 30 minutes. Stir the raspberry mixture occasionally while it sits.
In a large bowl, add the vanilla low-fat yogurt, fat-free half-and-half, and a pinch of salt. Using a wire whisk, mix until smooth.
Add the raspberry mixture to the yogurt mixture. Stir until combined.
Cover the bowl. Place the bowl in the refrigerator. Chill for about 2 hours, or until the mixture is cold.
Pour the chilled mixture into an ice cream machine.
Freeze the mixture according to the ice cream machine manufacturer’s instructions.
Transfer the frozen yogurt to an airtight freezer-safe container.
Place the container in the freezer. Freeze for 2 to 6 hours, or until firm.
Notes
Tips and Tricks
Chill the mixture well - The frozen yogurt base should be cold before it goes into the ice cream machine. This helps it freeze better.Use ripe raspberries - Ripe berries will give the frozen yogurt a better berry flavor.Do not skip the salt - A small pinch of salt helps balance the sweet and tart flavors.Freeze in a shallow container - A shallow airtight container helps the frozen yogurt firm up more evenly.Let it sit before scooping - If the frozen yogurt gets too firm in the freezer, let it sit at room temperature for a few minutes before scooping.