Meatball cowboy pie

Name: Meatball cowboy pie
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: American
Ingredients: 4 Morrisons Pork Sausages; 500g beef mince; 1 shallot or small red onion , finely chopped; 50g breadcrumbs; 1 egg; 1 tsp mixed dried herbs; 2 tbsp vegetable or sunflower oil; 1 onion , chopped; 2 garlic cloves , crushed or finely grated; 2 x 240g cans baked beans; 3 tbsp Morrisons BBQ sauce; 1kg potatoes , peeled and chopped; 25g butter; 75ml milk; 50g cheddar , grated; handful parsley , to serve (optional)