Preheat the oven to 190C/375F.
In a large pan, heat up some olive oil and cook onions and peppers for 5-7 minutes. Add in garlic, tomato paste and spices, cook for 1-2 minutes more.
2 garlic cloves, 1 onion, 1 teaspoon paprika, 1 teaspoon oregano, 1 bell pepper, 1 can tomatoes, 1 teaspoon chili flakes
Mix everything with black beans, corn and pureed tomatoes. Finally add chicken and quinoa, give another good stir and pour in the chicken stock. Bring to a boil and adjust the seasoning.
500 g 1 pound cooked chicken, cut into cubes, 1 cup red quinoa, 1 cup cooked black beans, 1 cup canned corn, 2 cups chicken stock
Transfer the mixture into a large casserole dish, cover with foil and bake for 1 hour and 30 minutes (keep an eye on the levels of liquid in the dish, add some stock if needed).
Finally remove the foil and sprinkle shredded cheese on top. Bake for 10 minutes.
1 ½ cup cheese, avocado, cilantro, sour cream