San Choy Bow Salad

• 2 tbsp soy sauce
• 2 tbsp oyster sauce
• 1 tsp sesame oil
• 1 tbsp sweet chilli sauce
• 2 tbsp extra virgin olive oil
• 1 brown onion
• 200 g mushrooms
• 250 g baby corn spears (approx 8)
• 150 g tin water chestnuts
• 2 cloves garlic, crushed
• 1 tsp ginger, minced (about 2cm of ginger)
• 300 g chicken mince
• 1 large iceberg lettuce
• 0.25 cup crushed peanuts
• 0.25 cup spring onion, finely chopped (optional)