Prawns and Penne Pasta

This is such and easy meal if prawns were cheaper we'd have it more often.  About 6 prawns each. Put penne pasta on to cook in salted water. Sweat an onion and some fresh garlic. Add the prawns and get them pink on both sides then remove them from the pan.  Add a can of tomato sauce and boil off some of it's water. Add the prawns back in. Add a handful of chopped fresh basil.  I used too much so don't over do it. Add the cooked pasta to the pan and serve. Fresh grated parmesan on top. It's easy and always good. The over abundance of basil made it a bit too perfumy, so I'll be more reserved next time.