I saw this recipe recently. Looks good.

Banana-Cinnamon Ice Cream
from dorastable.com

Yield: 1 quart
Time: 30 min.

Ingredients:
Bananas, very ripe, 3 of them frozen 6 ea.
Almond milk 2 cups
Vanilla, extract 1 tsp.
Cinnamon, ground ¼ tsp.

Preparation:
1. Blend all ingredients together until smooth.
2. Place in ice cream machine immediately and follow the manufacturers instructions.
3. You can eat it right away or put it in the freezer for later.

Chef’s Notes:
Regular ice cream has a lot of fat, which is why it is still somewhat soft even though it’s frozen. This ice cream has almost no fat at all, so it will become very hard once frozen. Be sure to take it out of the freezer a couple of minutes before eating to let it soften.