Place the oats, banana pieces, salt, water, cacao powder, and vanilla in a medium saucepan and bring to a boil over high heat. Stay close and do not let the pot overflow. Lower the heat to a simmer and gently cook the oats until tender, stirring occasionally and smashing the banana pieces to break them down. I like my oats pretty soft, so I cook them for about 15 minutes. But if you like them a little chewier, feel free to cook them for less time.Stir in almond milk according to desired consistency. I usually add about ½ cup. Stir oats continuously until almond milk is absorbed and oats are creamy. Add more milk as desired.Top as you wish, but a good drizzle of natural peanut butter is delicious here!