Soak the dried shrimp in warm water to cover for 15 minutes. Drain, then puree in a blender or food processor. Set aside.
Heat a Dutch oven or large pot over medium-high heat and add the olive oil. Saute the onions, stirring often, until soft, 4 to 5 minutes. Add the pureed shrimp and cook for 2 minutes. Add the nuts, garlic, ginger and peppers and cook, stirring often, for 1 minute. Add the stock, coconut milk and lime juice and cook until reduced by 1/2, about 20 minutes. Reduce the heat to medium. Add the fish and simmer until the fish is almost cooked through, 5 to 6 minutes. Add the shrimp and simmer until cooked through, 3 to 4 minutes. Season, to taste, with salt and freshly ground black pepper. Stir in 1/4 cup cilantro and remove from the heat.
Arrange a scoop of rice in the center of 6 large plates or soup bowls. Ladle the stew over the rice and garnish with the remaining 1/4 cup chopped cilantro. Place 1 lime wedge on each plate and serve immediately.
Yield: 6 servings