Preheat the oven to 450°F. In a small bowl, combine the carrots and 2 teaspoons of oil; season with salt. Transfer to a baking sheet and roast in the oven until golden, about 8 minutes. Set aside to cool. In a small bowl, combine the remaining 5 tablespoons oil, vinegar, shallot and thyme; season with salt. Whisk well to combine.