In a skillet, brown the chopped onion and garlic in the oil. Remove half the mixture and set aside in a bowl. Add the ground beef to the skillet and cook thoroughly. Add the wine or broth and Worcestershire sauce. Reduce by half. Season with salt and pepper. Pour into a bowl and allow to cool. Add the bread cubes, egg and parsley. Adjust the seasoning. Stuff the onions with this mixture.
Sauce
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