San Choy Bow

• 1 tbsp extra virgin olive oil
• 1 large brown onion
• 500 g lean pork mince
• 200 g mushroom, finely diced
• 250 g bean shoots
• 2 tbsp oyster sauce
• 1 Lebanese cucumber, diced
• 2 tomatoes, diced
• 2 small cos lettuce
• .25 cup peanuts, roughly chopped