Black Pepper Beef with Green Peppers and Onions

Click on ingredients to toggle pantry status. Click the shopping list button to add non-pantry ingredients to your shopping list.

• 1 2 tsp whole black peppercorns
• 1 450g (1lb) beef fillet, sliced into bite-sized pieces
• 1 2 tbsp oyster sauce
• 1 1 tbsp Chinese rice wine
• 1 2 tsp light soy sauce
• 1 a splash of sesame oil
• 1 2 tsp cornflour (cornstarch), plus 1 tbsp mixed with 2 tbsp water
• 1 1 1/2 tbsp groundnut oil
• 1 2 garlic cloves, thinly sliced
• 1 1 small green (bell) pepper, de-seeded and diced
• 1 1 small onion, diced
• 1 120ml (1/2 cup) chicken or vegetable stock