Smoky Citrus Chicken

Ingredients

• 2 Tbs. extra-virgin olive oil
• ½ white onion, thinly sliced
• 1 clove garlic, minced
• 2 Tbs. tomato paste
• 1 tsp. smoked paprika
• ¼ tsp. ground coriander
• pinch dried oregano
• ¼ cup fresh orange juice
• ¼ cup chicken stock ( preferably homemade ) or water
• 1½ cups shredded cooked chicken breast
• ¼ tsp. kosher salt
• freshly ground black pepper, to taste