Unless you’ve visited Sardinia, you probably haven’t heard about the island’s tasty treat called coccoi e corcoriga, which is made with butternut squash, zucchini, onion, olive oil, Parmigiano Reggiano, tomato paste, and a bit of all-purpose flour. To make the flatbread, you’ll need to start by grating your squash, zucchini, and onion.