How to Make It
Cook the pasta according to the package directions, reserving ½ cup of the cooking water; drain the pasta and return it to the pot.
Meanwhile, brown the pancetta in a large skillet over medium heat, tossing occasionally, until crisp, 8 to 10 minutes. Transfer to a plate; reserve the skillet.
Add the oil, cauliflower, ½ cup water, ¾ teaspoon salt, and ½ teaspoon pepper to the drippings in the skillet. Increase heat to medium-high and cook, covered, until the water has evaporated and the cauliflower is almost tender, 4 to 5 minutes.
Uncover the cauliflower and cook, tossing occasionally, until golden brown and tender, 4 to 6 minutes more.
Add the cauliflower, pancetta, egg, egg yolks, Parmesan, and ¼ cup of the reserved cooking water to the pasta and toss to coat (adding more cooking water as needed to loosen the sauce). Top with additional black pepper.
Note: Because the eggs in this recipe are not cooked, there is a risk of food-borne illness.