Gently fry the bacon in a non-stick frying pan until crispy, drain on kitchen paper and set aside. Wipe away the cooking fat, sauté the onion and garlic in the same pan. Add the tomatoes, paprika and sugar, season. Cover and simmer for approx. 15 mins.
Cook the spaghetti in boiling salted water until just al dente. Set aside 100 ml of cooking water, drain the spaghetti. Add the spaghetti, reserved cooking water and bacon to the sauce, mix. Serve with the cheese.