Marinate sliced beef with salt & pepper for 20 mins.
Bring some water to boil, blanch asparagus for 1-2 mins. Drain and set aside.
Place asparagus on sliced beef; roll sliced beef from the bottom to the top. Repeat with remaining sliced beef and asparagus.
Heat oil and pan fry beef rolls over medium heat till completely cooked. Add in capsicums and seasoning mix, stir-fry until cooked. Dish out and serve.