Mince and Bean Stir-fry (Meat or Veg)

• 1 tbsp peanut oil
• 1 brown onion, finely diced
• 3 cloves garlic, crushed
• 3 cm ginger, grated
• 1 tsp chilli flakes (optional)
• 500 g beef mince, lean
• 200 g broccolini, halved
• 300 g green beans, ends removed and halved
• 2 tbsp soy sauce
• 450 g brown rice, cooked