Cornish Game Hens With Port Sauce

½ cup orange juice ⅓ cup water ¼ cup port wine ¼ cup blackberry spreadable fruit 2 tablespoon sherry vinegar 2 tablespoon minced shallot or chopped onion 2 teaspoon grated fresh ginger 2 cloves garlic, minced 1 bay leaf ½ teaspoon dried thyme, crushed ¼ teaspoon instant chicken bouillon granules ¼ teaspoon cayenne pepper (optional) 2 tablespoon cold water 1 tablespoon cornstarch