1. In a glass or stainless-steel container, combine the sole, lemon juice, and 1/2 teaspoon of the salt. Let marinate at least 10 minutes.
2. In a blender, puree the garlic and ginger with the coconut milk, coriander, cumin, brown sugar, black pepper, turmeric, and cayenne.
3. In a large saucepan, heat the oil over moderate heat. Add the onion; cook, stirring occasionally, until golden, about 5 minutes. Add the tomato and cook, stirring occasionally, until soft, about 5 minutes. Add the coconut mixture, the jalapeños, the water, and the remaining 3/4 teaspoon salt and bring slowly almost to a simmer, stirring frequently.
4. Add the fish and 1 tablespoon of the marinade. Bring to a simmer and continue simmering until the fish is just done, 1 to 2 minutes.
Wine Recommendation: The spiciness and creaminess of this stew will be best accompanied by either beer or a bottle of acidic white wine with enough flavor to stand up to the coconut milk and heat. Try a Vouvray or other wine made from chenin blanc from the Loire Valley in France.