Easy Sang Choi Bau (San Choy Bow)

Ingredients

• 2 tsp cornflour/cornstarch
• 4 tbsp water
• 2 tbsp light soy
• 2 tbsp dark soy
• 3 tbsp oyster sauce
• 1 tbsp sesame sauce
• 3 tbsp Shaoxing cooking wine or Mirin
• 1 tbsp hoisin sauce
• 500g pork mince
• 150g shiitake mushrooms, finely chopped
• 150g water chestnuts, finely chopped
• 1 medium onion, finely chopped
• 2-3 garlic cloves, minced
• 2cm cubed piece ginger, minced, an equal amount to the garlic
• 1 onion (medium) finely chopped
• ½ cup of corn kernels (frozen and thawed are fine)
• Salt & pepper, to season to taste