Preheat the oven to 425 degrees F. Spray a 9x13 inch baking dish with nonstick spray.

Fill a saucepan with the squash, carrots and potatoes. Pour the Swanson Vegetable Broth over top. Bring the mixture to a simmer and cook for 10 to 15 minutes, until the vegetables are tender. Place a strainer over a large bowl and pour the vegetables into the strainer, catching the broth in the bowl. We will use the broth to stir into the base!

While the veggies are simmering in the broth, heat a large pot over medium heat and add the butter. Stir in the onion, brussels sprouts, garlic, salt and pepper. Stir in the sage. Cook, stirring often, until the onions and brussels soften, about 5 minutes. Stir in the flour to create a roux. Cook, stirring often, for 2 to 3 more minutes, until the flour becomes slightly golden and smells fragrant.

Slowly stream in the Swanson Vegetable Broth, stirring the entire time, so the filling thickens as you stir. Add the vegetables into the pot. Cook, stirring often, for 5 or 6 minutes until the base is thickened. Stir in the half and half, parmesan and nutmeg. Taste the mixture and season it with more salt and pepper if necessary.

Pour the filling into the baking dish. Layer the puff pastry over top. Beat together the egg and water in a bowl, then brush it all over the pastry. Press the sage leaves into the pastry and sprinkle with parmesan. Use a sharp knife to cut slits in the puff pastry so the steam escapes.

Bake the puff pastry for 30 to 35 minutes, or until the pastry is puffed and golden and the filling is bubbly underneath. Let cool slightly before serving!