Combine all the ingredients in a medium mixing bowl or your Ninja Creami tub. You can also blend them beforehand, but I don't find that necessary with this recipe.
Place the tub in the freezer for up to 24 hours. I find overnight is fine for me, but it depends on the temperature of your freezer. Leave the lid off to prevent a lump in the top of the frozen tub.
When you are ready to eat, blend your Ninja Creami using the Lite Ice Cream function. I find this recipe only needs a single blend. If your mixture looks lumpy or icy after one mix, repeat the process. You can also use the respin button.
Serve immediately. You can refrigerate any leftovers but you will need to process them again. Store leftovers with the lid on.