To a large pot, add the water, piloncillo, and cinnamon sticks. Bring to a boil, then lower the heat and simmer for 5 minutes to dissolve the piloncillo.
Next, add in the plant milk, vanilla, and oats. Cover and bring to a low boil again, then lower the heat to simmer for 15 minutes, stirring frequently. If you prefer your oatmeal a little thicker, cook for an additional 5 minutes with the lid off.
Divide between bowls and serve with plant milk, sweetener of choice, a sprinkle of cinnamon, sliced bananas, dried fruit, or whatever else you can think of. Enjoy!