Popping the amaranth. Bring a skillet to heat over high heat. When the skillet is so hot that beads of water can dance across it, toss in the amaranth seeds. As soon as the seeds begin popping -- like miniature popcorn kernels -- stir them continuously with a wooden spoon for about 5 minutes. When most of the seeds have turned darker brown and plump, just before they burn, take the skillet off the heat and put the popped amaranth into a bowl.
Making the cereal. Pour the warm milk over the popped amaranth. Add the cinnamon, ginger, and sugar, and stir. Top with the chopped dates and pecans.