Cook spaghetti in boiling, salted water according to packet instructions. Drain and reserve 2/3 cup (165ml) cooking water.
While the pasta is cooking heat a large, deep, non-stick frypan over medium-high heat. Add the oil, garlic and chilli and cook, stirring frequently, for 2-3 minutes or until the garlic starts to turn golden.
Add the prawns, cherry tomatoes and asparagus and cook, tossing, for 5-6 minutes, or until prawns are cooked.
Add the cooked spaghetti, parsley and zest, and lemon juice and toss well to combine. Add 1- 2 tablespoons of the reserved cooking water and season to taste. If the mixture is looking a little dry, add a little more water.
Serve scattered with extra sliced chilli, a handful of rocket, freshly ground black pepper and lemon wedges.
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