Steps
1. Pat the chicken dry and season it lightly with salt and pepper.
2. Warm the olive oil in a small, lidded pan over medium heat. Brown the chicken on both sides, about 6–8 minutes total, then transfer it to a plate.
3. Add the onion to the pan and cook until soft, about 4 minutes. Stir in the garlic and grated tomato; cook for 1 minute.
4. Pour in the sherry and scrape up the browned bits. Add the stock, prunes, and thyme, then return the chicken to the pan.
5. Cover and simmer gently for 20–25 minutes, turning the chicken once, until tender and cooked through. If the sauce looks thin, uncover for the final few minutes.
6. Meanwhile, toast the pine nuts in a dry small pan until lightly golden. Scatter them and the parsley over the chicken before serving.