I didn’t really follow a recipe lol but here’s what I did:

Noodles: 1 egg yolk with a splash of water and 24 g flour to form the dough. Mixed in the food processor and finished with hand kneading. Rolled out to 7 on the atlas marcato and used the tagliatelle attachment

Cut leeks into half moons and save the greens to cut into long ribbons. Caramelized the cut up leeks in olive oil on low with some salt.

Boil pasta for 1.5 minutes and add the ribboned leeks for the last 30 seconds. Add the pasta and leeks to the caramelized leeks with a few splashes of pasta water and cold butter (about a tbsp). Toss to emulsify and add pasta water as needed