Sometimes only a steak will do, but they tend to be very fatty. Using lean fillet steak helps keep the calories down and serving it with baked onion rings, salad and sweet potato fries mean you're still getting a good amount of vegetables. Each serving provides 527 kcal, 38g protein, 50g carbohydrate (of which 12.5g sugars), 17.5g fat (of which 5.4g saturates), 8g fibre and 0.6g salt.