I was watching the program The Kitchen on the Food Network.
I learned that you can freeze avocados.
You allow them to ripen, cut them in half, take out the seed and scoop
each half. Place halves on tray and freeze, then bag 'em up. Just
thaw overnight in the fridge.

You can freeze any citrus.
Freeze the citrus whole. Either thaw overnight in the fridge or place
in the microwave for 10-12 seconds.

Janet US