In a blender or food processor place the frozen bananas and strawberries. Blend until bananas and strawberries are creamy. May take a few minutes. It also may be necessary to add a little liquid to get them moving. We added a small amount of Almond Milk (just a couple teaspoons).
You can experiment and add a couple tablespoons of peanut butter instead of strawberries, other types of fruit and more.
I don't recommend in making more than you are going to eat in one sitting.