This dish will henceforth be known as the “three ps soup” in my house, both because it seems fitting, and because it’s a sister dish to my “four ps pasta”. But the latter does require a little explanation, if you’ll allow for a small detour from soup to pasta. The four ps pasta is one of the most memorable foods from my childhood. My mum would make it, without a recipe (although I do believe it originally started with Claudia Roden), seeming to conjure happiness out of a few fridge and storecupboard ingredients. To my hungry eyes, it seemed like my mum was in possession of the most entrancing kitchen magic as the house would fill with savoury-scented clouds of sizzling bacon, the hug-like fug of simmering chicken broth. Served in big bowls, with a little bit of brothy sauce, it has all the charm and healing powers of chicken soup, but with pancetta. Yum. Peas give it sweetness. Parsley a little earthy grassiness. And the fourth p? Well, that’s parmesan – unleash a few …