Sausage tray bake

Name: Sausage tray bake
Prep time: 15 min
Cook time: 1 h 10 min
Total time: 1 h 25 min
Cuisine: Italian
Ingredients: Low-calorie cooking spray; 12 Slimming World Pork Sausages; 2 large onions, chopped; 1 bay leaf; 6 fresh thyme sprigs, leaves picked; 5 fresh sage leaves, chopped; 1 tbsp tomato purée; 2 garlic cloves, chopped; 1 chicken stock cube, crumbled; 1 tbsp Bovril; 1 tsp Worcestershire sauce; 300g baby new potatoes, halved or quartered if large; 2 carrots, chopped into chunks; 3 red onions, sliced; 1 small butternut squash, peeled, deseeded and chopped into chunks; 3 portobello mushrooms, each cut into 6 pieces; 4 fresh rosemary sprigs, each cut into 3 pieces