Lightly spray beef with a little cooking spray and barbecue, pan fry or grill until cooked to your liking (2-3 minutes each side will be medium). Set aside to rest for 5 minutes, then slice thinly.
In a large bowl gently toss all salad ingredients.
To make the dressing, combine all dressing ingredients (garlic, caster sugar, lime juice and fish sauce) in a screw top jar and shake until the sugar has dissolved.
Combine beef with salad, drizzle with dressing and serve immediately.