This is one of my mum’s classic Sunday sauces, something I prepare now as a weekly meal, as it covers all my nutritional bases in one dish.
The ingredients are cheap and basic, but comforting, and likely already in your pantry: your favorite pasta (I like short shapes with a hole to collect the sauce, like penne or tortiglioni, sometimes whole wheat), a can of tomato purée (or chopped or crushed tomatoes, or even whole peeled tomatoes crushed with your hands), a can of good-quality tuna, a white onion, the heat of red pepper flakes, and of course, extra virgin olive oil and salt.