First, combine the frozen mixed berries, water, and your chosen sweetener in a blender or food processor. Blend until the mixture is perfectly smooth and uniform.
Carefully pour this vibrant berry blend into your Ninja Creami pint container, making sure not to exceed the max fill line. Secure the lid and place it in your freezer on a level surface for a minimum of 24 hours, or until it's completely frozen solid.
Once the pint is fully frozen, place it into the outer bowl of your Ninja Creami machine. Lock the outer bowl lid firmly in place. Then, select the "Sorbet" setting and let the Ninja Creami transform your frozen mix into a delicious treat!
If your sorbet isn't as silky as you'd like after the initial spin, don't worry! Simply use the "Re-spin" function to achieve that wonderfully smooth, creamy consistency.
Finally, scoop your refreshing sorbet into a bowl or a lovely glass and savor the cool, fruity goodness of your homemade, healthy dessert!