Shredded Chicken Tacos

• 12-18 corn tortillas, warmed
• 1 avocado, halved, pitted, and cut into 1/2" pieces
• 2 oz Cotija cheese, crumbled
• 6 scallions, minced
• Fresh cilantro, minced
• Lime wedges

CHICKEN

• 2 lbs boneless, skinless chicken thighs, trimmed
• 2 tbsp vegetable oil
• 1 onion, halved and sliced thin
• 2 tbsp minced canned chipotle chile in adobo sauce
• 1 tsp garlic powder
• 1 tsp ground cumin
• 1/4 tsp ground cinnamon
• 14.5 oz canned fire-roasted diced tomatoes, drained
• 1/2 tsp brown sugar
• 1 tsp grated lime zest
• 2 tbsp lime juice