https://www.bbc.co.uk/food/recipes/spaghettiallacarbona_86763

For instructions on how to make carbonara in large quantities, please read this: https://carminerodi.blog/2016/10/07/spaghetti-alla-carbonara/

Bring 4.5 litres/8 pints water (way more because this will be scaled up) to the boil in a large saucepan with 8 teaspoons of salt. Add the spaghetti and cook for 9 minutes, or until al dente.

Meanwhile, cut the pancetta/bacon into lardons (short little strips), about 6mm/¼in wide.

Heat a large, deep frying pan over a medium–high heat, add the oil and the pancetta/bacon and fry until lightly golden. Add the garlic and parsley and cook for a few seconds, then remove from the heat and set aside.

Drain the spaghetti well and tip into the frying pan with the pancetta/bacon, garlic and parsley. Add the beaten eggs and half the cheese and toss together well. Repeat in another frying pan, excluding the bacon for the vegetarians.

Season to taste with salt and pepper. The heat from the spaghetti will be sufficient to partly cook the egg, but still leave it moist and creamy. Take to the table and serve in warmed pasta bowls, sprinkled with the rest of the cheese.