Chef's Notes: This is one of my favorite soups, from a Food52 community member. It's done in about 30 minutes: silky, complex, nutritious, and perfect either as a first course or as a meal in itself. Roasting the carrots and infusing the broth with ginger and thyme are the secrets to giving the soup a sweet, earthy depth. Use a quality vegetable stock—since there are so few ingredients here, each one really counts.