Chicken Broth from an Electric Pressure Cooker - Rick Bayless

Ingredients

• 3 pounds cheap bone-in chicken parts
• 2 tablespoons vinegar (optional, but it will give the broth a more velvety texture by drawing gelatinous components from joints and bones)
• 1 large white onion, roughly chopped
• 1/2 head of garlic cloves peeled and halved
• 3 bay leaves
• 4 or 5 sprigs of thyme (or a teaspoon dried thyme)
• 1 tablespoon salt