Measure out all ingredients
Make the pesto by first adding the basil leaves, olive oil and hazelnuts to the blender and blitzing till smooth
Now add the parmesan, lemon juice, salt and garlic and blitz again until smooth
Taste and check for seasoning
Bring a pot of salted water to the boil and add the pasta
Cook for a minute short of the recommended cooking time
Add the drained pasta, flaked tuna and pesto to a frying pan over medium heat and toss/stir to combine, using a little of the pasta water to make a sauce
Heat through for a minute then serve with fresh parmesan and a basil leaf to granish