Butternut Crust Pizza

Name: Butternut Crust Pizza
Ingredients: 1 small butternut squash (about 2 1/2 pounds) peeled, seeded and cut into 1 1/2-inch cubes (to make 2 cups when pureed); 2 tablespoons extra-virgin olive oil; 1 1/2 teaspoons kosher salt; 1/2 cup all-purpose flour; 1 cup shredded Parmesan; 1 large egg; 1 tablespoon baking powder; 2 teaspoons Italian seasoning; Nonstick cooking spray, for the baking sheet; 2 cups baby arugula; 1 cup fresh basil leaves; 1/2 cup store-bought roasted almonds; 1/4 cup grated Parmesan; 1 lemon, juiced; 1/4 cup extra-virgin olive oil; 2 ounces thinly sliced prosciutto; Parmesan shavings, for garnish; Balsamic glaze, for garnish