Cook the pasta

• Bring a pot of salted water to a boil.
• Cook the spaghetti until al dente, then reserve a little pasta water before draining.

Make the lemon basil sauce

• Whisk the lemon zest, lemon juice, grated garlic, olive oil and grated parmesan in a bowl.
• Season with salt and black pepper.

Toss and serve

• Toss the hot drained pasta with the lemon sauce, loosening with a splash of pasta water.
• Fold through the torn basil and serve straight away.