Toss 1 1/2 pounds baby carrots, 3 tablespoons olive oil and 1/2 teaspoon crushed coriander seeds on a baking sheet; season with salt and pepper. Roast at 400 degrees F, turning once, 25 to 30 minutes. Top with 1 segmented orange (plus any juices) and 1/2 diced avocado. Season with salt and pepper.