In the same pan, (you might need to add a little oil) cook the 200 grams diced bacon until soft. Add the 2 tbsps olive oil and mix it into the onions, less than a minute to cook. If you onions are sticking don't add even more oil, best to add a little passata into the pan, stir it into onions. This will help prevent the onion from sticking or burning. Add the tomato paste1/3 cup water, 2-3 Tbsps cream or milk and Italian seasoning.Add the 2-3 tbsps olive oil, stir it in, add 1 cup passata and the 1/3 cup water, into the empty tomato cans. Season, and leave to simmer for 15 minutes until thick.