Combine the amaranth and water in a small saucepan, and bring to a boil. Reduce the heat to low, cover and simmer 30 minutes. Stir every once in a while, as the amaranth may stick to the bottom of the pan. Stir in the milk, syrup or brown sugar, and a pinch of salt. Stir vigorously until the porridge is creamy. Remove from the heat and serve.