Chicken Carne Asada Tacos with Pickled Onions Recipe

Ingredients

• 1/2 cup fresh orange juice (about 1 orange)
• 1/3 cup fresh lime juice (about 2 limes)
• 1 teaspoon sugar
• 1 teaspoon cumin seeds
• 1 medium red onion, thinly vertically sliced
• 1 1/2 pounds skinless, boneless chicken thighs, trimmed and cut into thin strips
• 1 teaspoon dried oregano
• 1 teaspoon ground cumin
• 3/4 teaspoon salt
• 3/4 teaspoon freshly ground black pepper
• Cooking spray
• 8 (6-inch) corn tortillas
• 1 cup diced peeled avocado (about 1 avocado)
• 1/2 cup (2 ounces) crumbled Cotija cheese
• Lime wedges (optional)