For the most colorful presentation use rainbow carrots, but you might use regular orange ones, as well.
Toss together carrots, parsnips, oil, salt, and pepper on a large rimmed baking sheet.
Bake until tender and browned, turning once halfway through cook time, 40 to 45 minutes.
Credit: Greg Dupree; Food Styling: Chelsea Zimmer; Prop Styling: Ginny Branch
Meanwhile, stir together softened butter and herbs in a small bowl until combined.
Chill until ready to serve.
Toss together hot vegetables and herb butter on baking sheet.
Transfer vegetable mixture to a platter.
