David Wolfe made this amazing recipes on HSN recently. If you don't have the Rx simply reduce the portions to fit the NutriBullet.
Pineapple Ice Cream in the Rx:
Frozen Pineapple chunks (fill 1/2 Rx Colossal Cup)
1/3 Vanilla Bean or vanilla extract
Almond milk (about 1 cup)
Coconut Water (add until the mixture completely blends thru, but don’t add too much or it will become a NutriBlast).
The goal is get a sorbet type of consistency. It works REALLY good with frozen Mango added and a slice of ginger added. Like INSANE.