Cavatelli with Chicken & Tomato

INGREDIENTS

• 2 Tbs. unsalted butter
• 3 Tbs. olive oil
• 3 lb. chicken thighs and drumsticks
• 1/2 lb. chicken livers, cleaned, trimmed of fat
• and coarsely chopped (optional)
• 1 small yellow onion, finely chopped
• 1 carrot, finely chopped
• 1 celery stalk, finely chopped
• 2 bay leaves
• 1/4 lb. cremini or button mushrooms, quartered
• and thinly sliced
• 2 1/2 cups canned crushed plum tomatoes with
• juices
• Salt and freshly ground pepper, to taste
• 1 lb. cavatelli, fusilli or other medium-size pasta