Cream (or mix) the eggs and the sugar together.
Add in the vanilla extract.
Mix in the sweetened condensed milk and evaporated milk.
Then add in a good-sized dash, or teaspoon, of salt.
Peel and mash the bananas; then mix them into the liquid ice cream mixture.
Pour the mixture into the metal canister of the ice cream maker.
Then finish topping off the canister with whole milk, making sure to fill it about 3/4 of the way full, leaving room for expansion as it freezes.
Put the lid on, and place the canister down into the bucket of your ice cream maker. Then attach the motor, clamp it on, and plug the ice cream maker in to get the motor running.
Gradually, pour crushed ice around the canister. Tip: You can add up to a gallon of water if needed, as well. We sometimes do this because our motor will seize up. Adding a bit of water will help it keep turning.
Alternately with the ice, add 2-3 cups of rock salt, making sure to top it off with rock salt.
Let the motor run until it stops, which signals that the ice cream is completely frozen. Once the ice cream is frozen, the motor on your ice cream maker will stop churning; and you need to unplug it immediately.
Wipe any excess ice or rock salt off the lid and out from around the top of the canister; then remove the lid and the churning paddle, and serve immediately. If you're not ready to serve it just yet, you can always leave the lid on (removing the motor), top it off with ice, and place a towel or two over it to help insulate it and keep it cold.