Chicken Mushroom Bourguignon

Name: Chicken Mushroom Bourguignon
Ingredients: 8 ounces cremini mushrooms; ½ a yellow onion; 3 garlic cloves; 3 parsley sprigs; 1 tablespoon olive oil; ½ cup pearl onions (I buy the frozen ones); 1 cup red cooking wine (Burgundy, Beaujolais, Cotes du Rhone or Chianti); 4 tablespoons tomato paste; 1 teaspoon soy sauce; 2 slices cooked bacon, chopped; ½ teaspoon dried thyme; ½ teaspoon sugar; ⅛ teaspoon pepper; 8 ounces farfalle pasta; 2 cups cubed cooked chicken pieces; 3 tablespoons half and half; 4 tablespoons sour cream, if desired for topping