Step 1

Preheat oven to 400 degrees. On a rimmed baking sheet, toss carrots, onion, thyme, and 2 tablespoons oil. Season with salt and pepper. Roast, stirring once, until tender, about 40 minutes.

Step 2

In a saucepan, bring quinoa and 1 1/4 cups water to a boil. Cover; reduce heat and simmer until tender, 16 minutes. Add spinach, cover, and let stand 5 minutes. Transfer to a bowl; top with vegetables. In another bowl, whisk together miso, lemon juice, and remaining 1 tablespoon oil. Drizzle over salad; toss.