Now comes the fun part. Add the hot, drained pasta to the skillet with the pancetta (off the heat). Slowly pour in the egg and cheese mixture, tossing everything together quickly. The heat from the pasta will cook the eggs gently, creating that creamy, luscious sauce. If it looks a bit thick, add some of the reserved pasta water, a little at a time, until you reach the perfect consistency. It’s like alchemy—everything blends into a smooth, glossy sauce.