Mediterranean chicken casserole

Name: Mediterranean chicken casserole
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: European, Mediterranean
Ingredients: 9.20 gm olive oil; 8 chicken lovely legs; 1 large brown onion, halved, thinly sliced; 3 celery sticks, trimmed, cut into 2cm-thick slices; 2 garlic cloves, crushed; 200g button mushrooms, thickly sliced; 2 x 400g cans diced Italian tomatoes; 1 chicken style stock cube; 150g (1 cup) frozen broad beans, thawed, peeled; 20.00 ml fresh thyme leaves; Freshly ground black pepper; 200g dried spiral pasta, optional, to serve