Cornbread Stuffing Muffins with Apple and Pancetta
INGREDIENTS
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* 7 cups ¾ inch cubes Cornbread (store-bought is fine) * 7 cups ¾ inch cubes crustless firm white sandwich bread * ½ cup (1 stick) butter, divided * 6 ounces diced pancetta * 1 large onion, chopped * 1 large crisp apple, peeled a