In a small saucepan, bring the water to a boil. Reduce the heat to low and pour
in the oats, flax seed, and salt. Cook, stirring occasionally, until the oats are soft and have absorbed most of the liquid, about 5 minutes. Add the milk, remove from heat, cover, and let stand for 2-3 minutes.
Layer on the toppings and let rest for a few minutes to cool. Thin with a little more milk, if desired. Serve warm.