Place dried shrimp in a bowl and cover with boiling water. Leave for at least 10 minutes, while they soften.
Drain and reserve liquid.
In a wok or deep skillet, heat oil.
Add onion and cook on low heat until the onions are halfway caramelized, about 10 minutes.
Add garlic, ginger, chiles, shrimp and starfish.
Stir-fry for 2 minutes.
Add pumpkin, fish sauce and soy sauce. Add a few tablespoons of the reserved shrimp liquid. Stir to combine.
Cover and cook on medium low heat until vegetable is cooked, about 8-10 minutes.
To serve, garnish with chopped peanuts and scallions.