In a medium pot, warm your vegetable or chicken broth over medium heat until simmering. Remove from the heat and set aside.
In the same pan that you used to cook mushroom and sage, melt 1 tbsp of butter and add in garlic, red onion, thyme, salt, and pepper. Sauté until fragrant.
Add gochujang and gochugaru, and cook for about 1 minute until well combined.
Add Arborio rice, stirring constantly until each grain is lightly glossy. *Optional* Add in the white wine to de-glaze the pan.
Add 1 cup of warm broth at a time, stirring constantly until the liquid is absorbed before adding more.
After adding the last cup of broth, stir in pumpkin puree. Continue cooking until the rice is creamy and tender. The rice will take about 20 minutes to cook.
Top the risotto with parmesan cheese, shiitake mushroom, and crispy sage. Serve hot and enjoy!