Fusilli are long, thick, corkscrew shaped pasta. The word fusilli presumably comes from fuso, as traditionally it is "spun" by pressing and rolling a small rod over the thin strips of pasta to wind them around it in a corkscrew shape.
Cook the fusilli according to the packet instructions and then drain, reserving the cooking water. Add the spinach, lemon zest and juice to the hot pasta and stir until the spinach has wilted. Pour 2 tablespoons of olive oil over the pasta and toss well. Add a little of the cooking water to make it saucier. Mix in the roasted squash and goat’s cheese then divide the pasta between 4 bowls. Sprinkle with the remaining sage and a drizzle of olive oil to serve.