Snap the woody stems off the asparagus and cut the remaining stalks diagonally at 2 cm intervals, leaving the tips whole.
Put a large pan of water and a pinch of salt on to boil, Cook the pasta according to packet instructions until al dente, then drain.
Meanwhile heat the oil in a frying pan, add the garlic and gently turn the garlic golden over a low heat. Add the lemon juice, stir and remove from the heat. Steam the asparagus for 2 minutes.
Add the drained pasta to the frying pan with the asparagus, lemon zest and parsley. Toss together and serve.