01 - Preheat oven to 425°F. Toss butternut squash cubes with olive oil, salt, and pepper. Spread on a baking sheet and roast for 25–30 minutes, turning once, until golden and tender. Set aside.
02 - Heat vegetable broth in a small saucepan over low heat and keep warm.
03 - In a large heavy-bottomed pot, melt 1 tbsp butter with 1 tbsp olive oil over medium heat. Add diced onion and cook for 3–4 minutes until soft and translucent. Add minced garlic and cook for 1 additional minute.
04 - Stir in Arborio rice and cook, stirring continuously, for 2 minutes until the rice is lightly toasted.
05 - Pour in white wine and stir until fully absorbed by the rice.
06 - Add warm broth in ½-cup increments, stirring frequently. Wait for each addition to be nearly absorbed before adding more. Continue this process for about 20 minutes until the rice is creamy and al dente. Not all broth may be needed.
07 - Gently fold roasted squash, Parmesan cheese, chopped sage, and remaining 1 tbsp butter into the risotto. Season with salt and pepper to taste.
08 - Plate immediately, garnishing with extra Parmesan and sage if desired.