Heat 1 cup of water until it steams lightly, then take it off the heat. If using ginger, steep the slices in it for 3 to 5 minutes.
Put the cinnamon in a mug, add 1 tablespoon of the warm water, and stir into a smooth paste so it does not clump.
Pour in the rest of the water while stirring. Let it cool until it is comfortable to sip, not hot.
Add the raw honey and stir until fully dissolved. Add lemon juice if using.
Drink warm, ideally with breakfast. Swirl the mug as you sip since some cinnamon settles.