Cook linguini in boiling salted water according to pack instructions. Drain and keep warm.
Meanwhile, fry onion, garlic and chilli in olive oil over a medium heat for 3-5 minutes until softened and beginning to brown.
Add the seafood, stirring until cooked-through, then stir through the zest and juice of one lemon.
Toss the seafood mixture and 1.5 - 2 tbsp grated Parmigiano Reggiano through the cooked linguini and serve topped with more Parmigiano Reggiano and parsley.