In a medium saucepan, bring water to a boil over high heat, then add the grated ginger and let it steep for 1 minute.
Add the steel-cut oats, cinnamon, and salt to the ginger water, stirring to combine.
Reduce heat to low and simmer for 8-10 minutes, stirring occasionally, until oats are tender and have absorbed most of the liquid.
Remove from heat and stir in vanilla extract and almond milk.
Let stand for 2 minutes to thicken, then divide between two bowls and serve with your favorite sugar-free toppings.