In a electric crockpot place onions and garlic. Add chicken to cooker

In a mixing bowl combine undrained tomatoes, tomato paste, vinegar, bay leaves, sugar, rosemary, salt, pepper mix well and pour over chicken

Cover and cook on low heat setting for 7 hours

When rdy to serve remove bay leaves stir mushrooms into chicken mixture and cook for 5 to 10 mins more to heat through

Meanwhile cook pasta. Serve the chicken and sauce over the hot cooked pasta and sprinkle with parmesa chicken