Mexican Chicken Tinga

Ingredients

• 3 pounds chicken breast
• 1 onion peeled and quartered
• 3 cloves garlic peeled and pounded
• 1 bay leaf
• 1/2 teaspoon peppercorns
• 1 tablespoon salt
• 7 1/2 ounces chipotle peppers in adobo sauce
• 2 tomatoes chopped
• 1 tablespoon canola oil
• 1 onion peeled and chopped
• 1 tablespoon cider vinegar
• 1/2 teaspoon cumin
• 1/2 teaspoon Mexican oregano dried