In a heavy skillet cook the garlic and the shallot with the thyme and salt and pepper to taste in the oil over moderately low heat, stirring, until the shallot is softened. Add the red onion and cook the mixture, stirring, for 5 to 10 minutes, or until the onion is very soft. Add the Port, the red wine, the sugar, and the vinegar and simmer the mixture, uncovered, for 5 to 10 minutes, or until almost all the liquid is evaporated. Stir in the parsley and salt and pepper to taste and cook the mixture, stirring, for 1 minute. The confit may be made 1 day in advance, kept covered and chilled, and reheated. Makes about 1 cup. veg x