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).
1 Shock and dry the green beans how you typically would. 2  Steam blanching, while a nice alternative to water blanching, is not as efficient. 3  It takes approximately 1 1/2 times longer to steam blanch green beans than to water blanch them.