Success! After messing with mashed banana recipes to come up with a faux ice cream treat that wouldn't break my diet, I've finally found a winner!
I made it up myself, my lambs, and you can tweak it at your leisure.
Here it is:
1 cup Plain low-fat yogurt (not Greek)
2 ripe bananas
2 packets Truvia
1/2 tsp vanilla extract
1/2 tsp almond extract
Mash the bananas and mix all the ingredients together. Stick the mixture into a freezer-safe container and let it freeze up. In just a few hours, you will have a creamy, delicious froyo of your own!
Also, I'd imagine that if you put the mixture in a pre-made graham cracker crust before setting it in the freezer, you'd have a rather delicious base for a fruit tart.