Cook enough spaghetti for 2 according to pack instructions
Meanwhile, heat some oil in a pan, and fry off 1/2 an onion and 1 chopped clove of garlic. Add some cubed salami (optional but REALLY tasty) and fry until golden.
Add 400g of chopped tomatoes and lower heat. Sprinkle in 1 tsp chilli flakes (or less if you prefer - I like mine spicy!) and 1/2 TBSP of sugar - this really brings out the taste of the tomatoes.
Simmer until the sauce is reduced, and take off the heat if spaghetti is still cooking.
Once the spaghetti is cooked, drain (retaining some of the cooking water) and add to the sauce. Add a dribble of cooking water to help the sauce adhere to the pasta. Toss the spaghetti and sauce together.
Serve with grated parmesan and some torn up basil leaves, if you have them (I didn't).