You can use almost every type of potato for this, from floury to firm. Steaming is well-suited for preserving all of the taste and vitamins of your potato, which also absorbs more water.
Put the potatoes, with or without skin, in the steamer. Season the potatoes with coarse sea salt. Steam the salted potatoes for 20 minutes.
Tip: A sprig of rosemary added to the steamer can be delicious.