Mixed seafood and silken tofu simmer in a light, savory broth for a nourishing combination. This high protein, healthy family soup is low calorie and brimming with ocean-fresh flavors.
In a large pot over medium heat, heat the sesame oil and gently sauté the onion, garlic, and ginger for 2–3 minutes until aromatic.
Add the sliced shiitake mushrooms and continue to sauté for another 2 minutes to draw out flavor and moisture.
Pour in the water and bring the mixture to a gentle boil; then add soy sauce and fish sauce for depth.
Reduce heat to medium-low, add the seafood (shrimp, squid, mussels, clams) and simmer for 5–7 minutes until the seafood is just cooked and mussels/clams have opened.
Carefully add the silken tofu in large spoonfuls; simmer very gently for 3–5 minutes, avoiding vigorous boiling to preserve the tofu's delicate texture.
Stir in baby spinach and season with sea salt and black pepper; cook for another 1–2 minutes until spinach wilts.
Taste and adjust seasoning as needed. Serve hot, ensuring seafood and tofu remain intact when ladling.