Pappardelle with tuna ragu

Name: Pappardelle with tuna ragu
Prep time: 25 min
Cook time: 30 min
Total time: 55 min
Cuisine: European, Italian, Mediterranean
Ingredients: 18.20 gm extra virgin olive oil; 20g unsalted butter; 1 red onion, finely chopped; 1 carrot, cut into 1cm cubes; 2 celery stalks, cut into 1cm cubes; 2 garlic cloves, crushed; 20.00 ml chopped fresh rosemary; 1 bay leaf; 22.20 gm tomato paste; 6 anchovy fillets, drained; 800g canned chopped tomatoes; 2 x 185g cans tuna in oil, drained; 240g pea; 400g pappardelle or other long pasta; 62.50 ml chopped flat-leaf parsley leaves