Place all the pulp and seeds into a medium bowl. If some of chunks are larger, just roughly chop or break apart with your fingers.
Add the cheese, ‘nduja and black pepper and toss lightly. Give a taste to see how much salt you want to add.
Place into the lower third of the oven and roast until the tomatoes are softened and wrinkled well, and the topping is browned and crispy. If the topping is browning before the tomatoes are completely cooked through, cover lightly with some tinfoil. This should take between 18-20 minutes. Check after 15 minutes though.
The size of tomatoes will affect the amount you will prepare. Four large tomatoes will be perfect for four people. But if the tomatoes are on the small side of medium, aim for two per person.
Vary up the pasta you choose- this works equally well over linguini as it does over farfalle!