Preheat your oven to 425°F (220°C). Toss the butternut squash with 1 tablespoon of olive oil, salt, and pepper, then spread on a large baking sheet. Do the same with the halved Brussels sprouts, arranging them on another sheet. Roast both for 25-30 minutes, turning once, until they achieve caramelized edges.
In a large pot, bring salted water to a boil. Add the bow tie pasta, cooking it according to package instructions until just al dente, then drain and set aside.
In a large skillet, heat the remaining 2 tablespoons of olive oil over medium heat. Add the sliced smoked sausage and cook until browned and slightly crispy, about 5-7 minutes. Once done, transfer the sausage to a plate and set aside.
In the same skillet, add minced garlic and sauté for about 1 minute until fragrant. Stir in the butter until it melts, then add the cooked pasta, tossing to coat well with the garlic butter.
Add the roasted butternut squash, Brussels sprouts, and browned sausage back into the skillet. Sprinkle with smoked paprika, lemon zest, thyme, along with salt and pepper. Give everything a good toss to evenly combine and heat through.
Serve hot, garnished with additional thyme if desired.