Put the bananas, peanut butter, coconut oil, cinnamon, nutmeg, and salt in a food processor and let them rest for 2-3 minutes.
Puree until smooth and creamy.
If you want a frozen yogurt consistency, then serve it up as-is! Or, if you like a firmer ice cream consistency, put it into a container and freeze for an hour. Garnish with dark chocolate shavings or cinnamon!