01 - Heat 1 tablespoon olive oil in a large skillet or casserole over medium-high heat. Add the chorizo slices and cook for 2–3 minutes until they release their oil and begin to crisp. Remove from pan and set aside.
02 - Season chicken chunks lightly with salt and pepper. Add to the same skillet and brown on all sides for 5–6 minutes. Remove and set aside with the chorizo.
03 - Reduce heat to medium. Add remaining tablespoon of olive oil to the skillet. Sauté sliced onion and minced garlic for 2–3 minutes until softened and fragrant.
04 - Add sliced red and yellow bell peppers to the skillet. Cook for 5 minutes, stirring occasionally, until they begin to soften and develop slight color.
05 - Stir in smoked paprika, ground cumin, dried oregano, and chili flakes if using. Cook for 1 minute, stirring constantly, until spices become fragrant.
06 - Add tomato paste and canned diced tomatoes to the skillet. Stir thoroughly to combine, scraping up any browned bits from the bottom of the pan.
07 - Return browned chicken and crisped chorizo to the pan. Stir to combine all ingredients. Simmer uncovered for 15–20 minutes, stirring occasionally, until chicken is cooked through and sauce has thickened to desired consistency.
08 - Taste the dish and adjust salt and pepper seasoning as needed. Garnish with chopped fresh parsley and serve immediately.