Chicken Tinga Tacos

Ingredients

• 1 tablespoon extra-virgin olive oil
• 1 cup roughly chopped sweet onion
• 2 garlic cloves, minced
• 3 tablespoons pureed chipotle peppers in adobo
• 1 teaspoon dried oregano
• ½ teaspoon ground cumin
• ¾ cup canned crushed fire-roasted tomatoes
• ¼ cup chicken stock
• ½ teaspoon kosher salt
• 3 cups shredded rotisserie chicken
• 10 six-inch corn tortillas
• 2 ripe avocados, sliced
• ¼ cup chopped fresh cilantro
• ½ cup diced red onion
• Crumbled cotija cheese
• 1 lime, cut into wedges