http://www.epicgardening.com/how-to-grow-amaranth-microgreens/
Red Garnet Amaranth Sprouts have a more subtle, earthy flavor than some, more pungent, microgreens. These greens are packed with vitamin K1, as a matter of fact, Amaranth microgreens have more of this vitamin than any other microgreen.
To plant amaranth seeds, place about 1 inch of potting soil on the bottom of the pot or container, and flatten it out (without mashing it) with your hand. Then, sprinkle a thin layer of seeds over the soil, and press them gently in. Cover the seeds with a light layer of top soil, and spray the surface lightly with a plant mister. Instead of misting, you can cover the seeds with a layer of plastic wrap, which you leave on throughout germination.
Mist the soil twice a day lightly until the sprouts appear, which should be in about a week. If you are using plastic wrap, be sure to remove it after the seeds have sprouted. Once the seeds are up, keep misting the plants twice a day.
To reap the health benefits of microgreens, eat them immediately after harvest. Microgreens, like most other superfoods that are consumed fresh, begin to lose their nutritional value rapidly after harvest. Consider growing your own microgreens at home, as this will allow you to decide exactly when you harvest your crop.