Chicken Carne Asada Tacos with Pickled Onions (and Spicy Black Beans)

I've been looking back through old recipes I have saved from magazine and have been finding some great ones! This one was in a 2010 issue of Cooking Light magazine and they were SO good! The pickled onions were easy to make and added such a nice dimension to the flavor. The combination of it all was just perfect! We ate these last week and typing this up now is really making me want some more!

Ingredients:
* 1/2 cup fresh orange juice
* 1/3 cup fresh lime juice
* 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 (I used chicken breasts)
* 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 (I couldn't find and used queso fresco instead)
* Lime wedges (optional)

Directions:
1. Combine first 4 ingredients in a medium bowl, stirring until sugar dissolves. Place onion in a small saucepan; cover with water. Bring to a boil; drain and plunge onion in ice water. Drain onion; add to juice mixture. Chill until ready to serve.
2. Heat a large cast-iron skillet over high heat. Sprinkle chicken with oregano, cumin, salt, and pepper; toss to coat. Coat pan with cooking spray. Add chicken to pan; cook 4 minutes or until browned and done, stirring occasionally.
3. Heat tortillas according to package directions. Divide chicken evenly among tortillas. Drain onion; divide evenly among tortillas. Top each tortilla with 2 tablespoons avocado and 1 tablespoon cheese; fold over. Serve with lime wedges, if desired.

Serving Size: 2 tacos * Calories: 413 * Fat: 17.1g * Saturated fat: 5.2g * Monounsaturated fat: 7.1g * Polyunsaturated fat: 2.7g * Protein: 33.4g * Carbohydrate: 33.6g * Fiber: 4.9g * Cholesterol: 123mg * Iron: 3.2mg * Sodium: 825mg * Calcium: 237mg

For Spicy Black Beans:
1. Remove 1 teaspoon adobo sauce from 1 can chiptole chiles in adobo sauce; reserve remaining chiles and sauce for another use.
2. Combine 1 teaspoon adobo sauce; 1/4 c low-sodium chicken broth and 1 (15 oz) can drained black beans in saucepan; bring to a boil.
3. Mash bean mixture. Sprinkle with 1 T chopped fresh cilantro.