Easy peasy awesome tomato and mascarpone pasta:
Buy a bottle of nice passata (£1.25)
Buy a container of marscarpone cheese (£1.50)
Buy some spaghetti (fresh or dried, whatever you find easier to cook)
Buy some mixed herbs (dried)
Put the passata into a pan (I usually use a skillet as I sometimes fry off onions before heating the passata). Add a pinch or two of mixed herbs, some salt and pepper to taste, and heat the passata up on a medium heat until it starts to bubble. Turn it down and add half the mascarpone cheese to the passata and mix in. Leave it to simmer whilst you cook the spaghetti. Once the spaghetti is ready, serve on top of the spaghetti! If you want to add some parmesan cheese to the sauce go for it, that's totally down to taste.
That's a really simple but tasty pasta meal right there, all for cheaper than you can buy the ready made pasta and sauce in the shops (well, almost, but it's so much better!)