Pollo alla Romana is an old peasant dish originating from Rome. It's made with a combination of chicken pieces, pancetta, onions, garlic, white wine, tomatoes, olive oil, and bell peppers. The meat is simmered with other ingredients until they become tender and create a comforting and rich sauce.
This dish is typically slow-cooked – people used to prepare it in the morning, and left it to simmer for a few hours. It was originally invented as a way to use up low-quality meat, wine, and herbs which tenderize the meat and give it flavor.