01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a small bowl, whisk miso paste, maple syrup, olive oil, soy sauce, rice vinegar, garlic, and ginger until smooth.
03 - Place sweet potatoes, bell pepper, zucchini, onion, and broccoli in a large bowl. Drizzle two-thirds of the glaze over vegetables and toss until evenly coated.
04 - Spread vegetables in a single layer on prepared baking sheet. Roast for 25 to 30 minutes, stirring halfway, until vegetables are tender and caramelized.
05 - While vegetables roast, cook pasta in boiling salted water according to package instructions. Drain and reserve 1/2 cup pasta water.
06 - Return drained pasta to the pot. Add roasted vegetables and remaining glaze. Toss well, adding reserved pasta water a little at a time until a silky sauce forms.
07 - Divide pasta among serving bowls. Garnish with sesame seeds, green onions, and fresh herbs if desired. Serve immediately.