Heat up a wok or frying pan with 1 tablespoon of oil and stir fry the shallot, dried shrimp (if using) and diced mushrooms until fragrant, about 2-3 minutes. Transfer to a bowl and set aside.
Add in the ground pork, 5-spice powder, sea salt, 2 teaspoon soy sauce, black pepper and minced ginger. Continue to cook until the pork is no longer pink and cooked through.
Add in the fried shallot, shrimp, and mushroom.
Next, add in the carrot, water chestnut and garlic, continue to cook for 2 more minutes.
Make the cornstarch slurry by mixing cornstarch and water in a small bowl.
Add in the seasonings: 1 tablespoon soy sauce, 1 teaspoon Shaoxing wine, 1 teaspoon sesame oil, 1 teaspoon oyster sauce, 1 teaspoon granulated sugar, and cornstarch slurry and cook for another 2 minutes.
Remove from heat and transfer to a clean bowl to cool down.
Add in the garlic chives and give the mixture a stir.
Cover the filling and chill in the fridge overnight.