Overnight Slow Cooker Chicken Stock

chicken carcass

whole carrots, washed and unpeeled

large yellow onion, washed and unpeeled

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white onions, unpeeled

red onion, peeled

shallots, unpeeled

whole head of garlic, unpeeled

stalks of celery, washed and cut in half

bay leaves

sprigs of fresh thyme tied together

black peppercorns

Large bunch of parsley

Water to fill