Leftover Spaghetti Frittata

Crisp, golden and fiercely fought over. A proper second-day comfort dish. This was a regular in our house. My mum would make it with leftover spaghetti in tomato sauce, cooked again, this time in a pan with butter until the edges went crunchy and golden. It was one of the only times she used butter instead of olive oil, which in Sicily, I guess, always felt like a slightly northern move. But this dish needed it. The butter gave it flavour and bite. You could smell it as you rushed up the st