One thing i cant stand is buying ready made pasta sauces, not because i think the good ones are bad, but just because making your own is the simplest thing in the world and at about 25p/portion you really cant complain.
This is pretty much my base sauce but you can add anything you want - bacon, sun-dried tomatoes, olives
Tin of chopped tomatoes - try and get nice ones (Ciro, Napolina) but cheap ones are fine you will just have to cook them down more.
1-2 cloves of garlic - smashed
Handful of fresh Basil - torn*
Pinch of chilli flakes
Dash of Balsamic vinegar
Salt and pepper
Gently heat the olive oil, and add the smashed garlic until it softens. Add the splash of balsamic and let it cook for a couple of seconds then add the chillies and chopped tomatoes, season and then most importantly let the sauce cook down for at least 15 minutes.
When it has thickened and is a nice deep red add the basil and serve with good pasta a drizzle of olive oil, add cheese for a tasty addition.
*I will rant about fresh herbs because they are so much better. Dried ones taste of nothing (oregano is probably the one exception). Dried Spices are brilliant, but fresh basil is not difficult to keep, even in my student flat I normally have basil and coriander at least.