Mushroom and lemon thyme stuffed chicken pillow

Name: Mushroom and lemon thyme stuffed chicken pillow
Prep time: 1 h
Cook time: 1 h
Total time: 2 h
Yield: 4
Cuisine: French
Ingredients: 1 whole Lilydale Chicken, deboned; 600g (21 oz) mushrooms of your choice, diced; 3 shallots, finely diced; 4 cloves of garlic, finely diced; 10 sprigs of lemon thyme, leaves picked and finely chopped; 3 tbsp(45ml) of olive oil; 50g (1.8 oz) of butter; 30g (1 oz) panko breadcrumbs; salt and pepper, to taste; 1 brown onion, finely diced; 1 carrot, finely diced; 1 stick of celery, finely diced; 3 tbsp (45ml) olive oil; 150g (5.3 oz) pearl barley; 1L chicken stock; 8 sprigs of lemon thyme; 2 bay leaves; half a bunch of kale, finely chopped