Cod in Garlic-Ginger Broth

INGREDIENTS

• 1/2 yellow onion, finely diced
• 1 1/2 teaspoons grated fresh ginger (use a rasp grater)
• 1 garlic clove, through a garlic press
• 1 teaspoon cooking oil
• 2 tablespoons low-sodium soy sauce
• 3 cups dashi (see note above) or vegetable broth
• 1 teaspoon lime juice
• 1 (12-ounce) piece cod, skin removed
• 8 shiitake mushrooms, stems removed, caps thinly sliced
• 1 carrot, peeled and sliced into thin matchsticks (or 1 handful of matchstick-cut carrots)
• 3 scallions (white and green parts), finely chopped
• 2 tablespoons fresh cilantro, roughly chopped