I am green with envy as Bologna is one of my favorite cities. Unfortunately, it does take quite a bit of cooking and prep. The onions must sit for 4 hours with salt and sugar to soften and bring out their natural juices. Then they slowly cook for 2 hours, after which the tomatoes are added and cooked for a further 2 hours. It is worth it. You could make a double batch and freeze half so you don’t have to go through this again for a while. It freezes really well, defrost in the fridge overnight and warm in a pan without a lid just in case there is any extra liquid over medium heat. Just make sure you use the best tomatoes you can find because as you know, they do have the best ingredients over there and when I try and recreate dishes at home, they are never quite the same. World Market and Amazon are the best places for canned tomatoes. Let me know if you have any other questions, enjoy!