You can build a surprisingly effective steamer with just two reusable aluminum pie tins. First, poke 12–16 holes in the base of both pie tins.
Next, use a rolling pin to flatten one of the pie tins. Don't worry about getting it perfectly flat; this is all about convenience, so just run over the tin with your rolling pin a few times.
Now you're ready to put your steamer together. Place the structurally sound tin upside-down in a pot with a little water. Rest the flattened tin on top of the first, and place your veggies (or whatever you're steaming) on top of it.
Turn on the heat and you'll have a perfect steamer in action!
Credit: wonderhowto.com