Bananas.

 We eat a lot of bananas but sometimes we have to many and they go really yellow before we can eat them. In that case I freeze them and use them in smoothies. Everybody has different way of freezing bananas, I know some people just brake them in half or even freeze them whole. I always cut it in slices and freeze it on a cookie sheet first before I put it in a bag. The reason for that is that I don't have very powerful blender and big pieces will not even turn in my blender. I also defrost them slightly before I make the smoothie.

This smoothie is from frozen bananas and strawberries.