Quinoa with Buttery Roasted Vegetables

Name: Quinoa with Buttery Roasted Vegetables
Ingredients: 1 cup quinoa; 8 tablespoons (1 stick) salted butter; 3 cloves garlic, minced; 2 large carrots, peeled, halved lengthwise and cut into 1-inch pieces; 2 large parsnips, peeled, halved lengthwise and cut into 1-inch pieces; 1/2 red onion, cut into large chunks; 1/2 butternut squash, peeled, seeded and cut into large chunks; Kosher salt and freshly ground black pepper; Juice of 1 lemon; 1/4 cup pine nuts; 6 ounces baby arugula leaves; 1 cup Parmesan shavings