Boil up plenty of salted water for the pasta. In the meantime, wash the mussels thoroughly and drain well. Remove open mussels. Peel garlic and chop finely. Wash the pepperoni. Wash, clean and cut the tomatoes into eighths
Heat the oil in a cast-iron pan. Add garlic and pepperoni, sauté briefly, season with salt and pepper. Add mussels, mix, heat and cook for 4-6 minutes with the lid closed (remove unopened mussels). Add tomatoes, mix in and heat up again briefly
Meanwhile, prepare the pasta in boiling salted water according to the instructions on the packet. Wash parsley, shake dry and cut into fine strips. Pour the noodles into a sieve and mix into the mussels. Mix in the parsley. Arrange on plates