You can effortlessly make stuffed pasta shells into a heartier dish - and boost its protein content - by mixing canned tuna ...

Stir in the tuna and salt. Toss the pasta with the sauce, loosening with a little pasta water if necessary. Serve the tuna pasta sprinkled with the remaining parsley and freshly ground pepper.

Season with a little salt and lots of ground black pepper. Drain the pasta and add to the tomato and tuna sauce. Toss together until well combined then serve. You could add sliced olives to this ...