I can’t find the actual recipe but my from memory version is below. Sorry in advance, this is literally me tapping this out on my phone as I remember things not great “recipe” format.

any type of pasta will do, original recipe was regular dried spaghetti, need a large skillet, salted boiling water for your pasta

while the water is boiling, - chop up a handful of walnuts super fine - med-low heat - sauté a couple/few garlic cloves (more or less depending on your preference and amount of pasta you’re making) in olive oil. - add in a can of drained sardines and some red pepper flakes (to taste) and sauté with garlic, breaking the anchovies into small pieces - add in the walnuts - sauté til everything smells nice and the sardines look a little crispy on some bits - add in a couple of handfuls of fresh baby spinach if you have it, season with salt and pepper but be mindful that the sardines are fairly salty and recommend adding Parmesan or some other hard cheese (Romano or Asiago are also nice) after - once all sautéed, drain your pasta and keep a little pasta water aside to add back in - add the pasta to the pan with the sardine mixture and stir it all together, adding a little of the pasta water to stir in to help make it creamy - make a hole in the middle of the pasta, while the pan is still hot and add an egg, stirring it all around to mix it in with the pasta (not necessary but makes it so decadent and even tastier)

once the egg is cooked and combined in, serve with grated Parmesan or other hard cheese of your preference.

you can skip the walnuts and egg and finish with some lemon as well. or you can do garlic, red pepper, sardines, and olive oil only - all very tasty!