To make the beef, heat a griddle pan or barbecue until smoking. Rub the steak with the oil and season both sides with salt and freshly ground black pepper. Add the steak to the hot griddle and grill for 5 minutes on each side. Leave to rest on a warm plate.

Cook the asparagus in a large pan of boiling water for 4-5 mins until tender. Drain well, cool under running water, then cut into finger-length pieces. Toss together with pine nuts, pesto and mustard.

Slice the beef into thin strips and lie on top of the dressed asparagus. Season and drizzle lemon juice and balsamic vinegar over the meat.