Paksiw na lechon manok (roast chicken stew in vinegar)

Ingredients

• 1 piece whole garlic, peeled and crushed
• 1 large onion, chopped,
• 1 big stick of cinnamon,
• 2 pieces bay leaves (laurel)
• ½ teaspoon whole peppercorn
• ½ teaspoon cracked pepper
• ½ teaspoon salt.
• ¾ cup white vinegar,
• 6 tablespoons soy sauce,
• 6 tablespoons brown sugar (or more),
• 1 ½ cup broth (or more) and
• 1 cup leftover lechon sauce (or the one commercially available or even liver spread or just plain cooked liver). Please note though that you might need to adjust the amount of vinegar if you are using just liver spread or plain cooked liver. Combine all these ingredients in a mixing bowl to create this dark sauce.