Salt and pepper both sides of the chicken thighs and into the fridge. Take it out a bit before cooking to take the chill off. Cook the pancetta until lightly brown and gently brown the chicken on both sides.
Finely mince your onion, red pepper, carrot, celery and garlic and then sauté in the same saucepan. Add olive oil as needed. Deglaze with your Marsala wine. Add your tomatoes and the rest of the ingredients, and simmer gently for 1-2 hours. It just gets better.
Spoon into bowls and grate Parmesan cheese on top. It’s very good on it’s own like a stew, with some crusty bread, but feel free to serve with pasta or extra vegetables if you choose. If you choose pasta, use a tube or shaped pasta, like penne or rigatoni.