Placing soaked almonds in a mixing dish with enough water to cover them will allow them to soak for at least 4 hours and up to overnight.
Once the almonds have been soaked, throw them in a blender with 12 glasses of water and mix until smooth.
Set aside the almond milk after straining it through a strainer to remove any remaining particles. Blend on high for 2 minutes, or until it is completely smooth.
Heat the water at medium heat in a saucepan.
After bringing the water to a gentle simmer, add the cinnamon stick and black tea leaves.
Simmer the tea for 2 minutes, then drain it to remove the cinnamon and tea leaves from the mixture.
Serve the tea hot, and mix with some homemade almond milk if desired.