Recipe

1. Fill a large saucepan with 16 cups cold tap water and add the salt. Cover with a lid and place over a medium-high heat to bring to the boil.
2. In the meantime, put the olive oil, onions, garlic and chili into a large frying pan and place it over a medium-low heat for 5 minutes before adding the pancetta. Cook for a further 5 minutes or until the onion has lightly caramelized.
3. Once the water comes to the boil, add the spaghetti and stir it every few minutes to prevent it from sticking together. After approximately 7 minutes, whisk the egg yolks and Parmesan together in a bowl and add a ladle of the pasta water.
4. A minute or so before the spaghetti is cooked, take the pancetta and onions off the heat and add the frozen peas.
5. Drain the pasta and return it to the pan. Add the contents of the frying pan along with the egg and cheese mixture, and mix together. Allow to sit for 2 minutes. Season with salt and freshly ground pepper to taste.
6. Stir thoroughly to incorporate everything, then serve with more grated Parmesan sprinkled on top.

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Reprinted with permission from Heston Blumenthal at Home (2011 Bloomsbury).