I just came across these instructions for baking a Cornish hen:
Then pull out the cookie sheets, then put on an oven mitt, an[d] carefully peal the foil down on each bird, be very careful as steam will come out. Peal the foil down to expose as much of the bird as possible, but do not remove it. Then place the birds back in the oven for another 15 minutes, this will brown them up a bit.
Once would be a typo; twice probably indicates that the writer has confused peal and peel.
The appropriate spelling in the context of removing foil from the bird is peel:
To pare off or strip away (the skin of a fruit or vegetable, or the bark of a tree); to remove (the natural outer layer of something)
The spelling peal has to do with a loud sound:
intr. To sound forth in a peal; to resound.
trans. To sound (something) forth in a peal, to produce (a sound, etc.) with loud reverberation; to utter or proclaim loudly and sonorously.
Church bells peal when people marry. The word can be used as either a verb or a noun.
The connotation of peal is usually one of happiness. People explode in peals of laughter. When church bells are rung for a funeral, they are said to toll.