When asked to steam something in a recipe, you need to know the specific technique in order to complete the cooking of the recipe you are working on. If you want to steam tortillas, you will need to use a tortilla steamer. If you don’t have one, place a damp paper towel on a sandwich plate, place the tortillas on the paper towel and cover this with an upside down sandwich plate and microwave for 1 minute.
Typically, when you want to steam something, you will need a pot with about 1/4 to 1/2 cup of water on the bottom. On top of the water, you will need to place a steamer. I use a metal steamer such as this:
Because of the way this steamer is made, you can use it in several different size pots. I have had mine for years and reach for it every time.
Once the steamer is in place, bring the water to a boil (you will see the water bubble through the holes) then place the vegetables in the steamer and cover the pot. Different vegetables will cook in different times so refer to the recipe you are working with for the length of time you will need for what you’re working with.