Firelight Heritage Farm Publishing is based in the United States.
Microgreens can be expensive to grow, because they not only take a lot of seed, they also take fresh soil for every batch. The combination of those two things makes them more expensive to produce than sprouts.
You can grow Microgreens the same way you grow sprouts, without the dirt. Grow them in a sprouter, or on wet papertowels. Either one will work fine. Rinse or mist them to wet them once or twice a day (depending on your climate).
Let them grow until the second set of leaves appear. Cut them with scissors, and enjoy!