Spaghetti Bolognese

Name: Spaghetti Bolognese
Ingredients: 2 tablespoons olive oil; 1 brown onion, chopped; 2 cloves garlic, crushed; 1 kg beef mince; ⅓ cup (90g) tomato paste; 2 x 400 g cans chopped tomatoes; 2 cups (500ml) beef stock; 1 bay leaf; sea salt and cracked black pepper; 400 g spaghetti; flat-leaf parsley leaves, to serve; shaved parmesan, to serve