Place a small saucepan over medium-high heat, and add the amaranth. Toast until it begins to pop, 4 to 5 minutes.
While the amaranth is cooking, bring the stock to a boil in a medium saucepan.
Add the amaranth and the salt to the stock. Cover the pan, reduce the heat, and simmer until all the liquid has been absorbed, 7 minutes.
Remove the pan from the heat and set it aside, still covered, to steam for 7 minutes.
Pour the amaranth into a bowl and use as desired.