Preheat oven to 350 F.
Mash the banana really well with a fork. Add in the egg yolks and mash with fork to combine. Then, stir in the milk, flaxseed and cinnamon. Let this stand for 5 minutes to allow the ground flaxseed to thicken up just slightly. Then, mix again one more time.
Pour into two custard dishes – or use several if you’d like!
Place the dishes into a baking pan.
Pour water into baking pan until the water level reaches halfway up the custard dish. This is called a hot water bath.
Bake for 25-35 minutes or until a knife inserted into the middle comes out clean. Every oven works slightly differently, so keep that in mind!
You can serve this after it has cooled. Or, keep it in the fridge for a few hours to serve it your baby cold. There’s nothing wrong with serving safe food that is cold!