Preheat the oven to 375°F.
In a large glass measuring cup, whisk together 1 cup of vegetable broth with the pumpkin purée. Set aside.
Heat olive oil in a large heavy-bottomed oven-safe pot over medium-high heat.
Add the shallot and sauté for 1 minute, then add garlic and cook for another 30 seconds. Season with salt and pepper.
Pour in the white wine and cook for 1 minute, scraping brown bits from the pot’s bottom.
Add the pumpkin broth mixture and remaining 3 cups of vegetable broth. Stir in sage, rosemary, nutmeg, red pepper flakes, and season with salt and pepper.
Cover the pot with a lid, bring to a boil.
Once boiling, stir in the rice. Replace the lid, remove from heat, and place the pot on the middle oven rack.
Bake for 60 to 70 minutes until rice is tender and cooked through.
Remove the pot from the oven and vigorously stir in the goat cheese for 2 minutes until creamy and thick. Add more broth or water if risotto is too dry.
Season with salt and pepper to taste.
Serve topped with reserved goat cheese, dried cranberries, pumpkin seeds, and additional chopped sage and rosemary.