Wood will expand and contract across the grain, and a wide panel made of solid wood could change width by a half of an inch, warping the door frame. By allowing the wood panel to float, it can expand and contract without damaging the door.
Put trimmed and cleaned green beans in the steamer basket, set over the boiling water, cover, and steam until tender to the bite, 3 to 5 minutes (depending, again, on how crisp or tender you like your green beans).
I make this recipe slightly different to speed up cooking time. I steam the green beans in a pot separately for about 10 minutes, and at the same time get my garlic green onion sauteeing in the skillet with some bacon. I then strain the green beans, and dump them in the skillet to finish up â about 5 minutes.