Keep an eye out for quality ramen, which means it's not deep fried and is devoid of artificial ingredients. Typically organic ramen is a good bet and you can find it in specialty markets and the natural foods section of some supermarkets. Baked and smoked tofu is sold in the refrigerated section of the market near other types of tofu. To reduce the amount of sodium, start with one seasoning packet instead of two. Taste and adjust as needed.
Pour the water into a medium pot and bring to a boil. Add the ramen seasoning packet and stir. Break up the ramen noodles as you add them to the boiling broth. Add the edamame, tofu, and spinach. Cook 1 minute less than the instructions suggest. Remove from heat. Stir and transfer immediately to thermoses (tongs can be useful to transfer the noodles).