Bring 7 cups (1.7 L) water to a boil in a medium pot.
Add the oats, ginger, cinnamon sticks, and salt to the boiling water. Reduce heat to low and let it simmer, three-quarters covered, for 30 minutes. Check to make sure the water level remains the same, adding more water if needed. Keep an eye on the pot, as it is very easy for this tea to boil over.
When the water has turned a milky white color and the mixture has a smooth consistency, strain it, saving the oats for another use (congee or cookies come to mind!). Pour the tea into a glass jar or directly into your mug, then stir in the honey. Sprinkle the top with a touch of ground cinnamon and drink warm.
Store in the fridge for up to 3 days. Reheat by adding a little boiling water, stir, and enjoy!