Boil 1 pound spaghetti; drain and reserve 1 cup pasta water. Meanwhile, cook 1/2 pound diced pancetta and 3 sliced garlic cloves in olive oil. Whisk 2 eggs, 1 cup grated Parmesan, 1/4 cup chopped parsley, 1/2 to 1 cup pasta water and some pepper; toss with the hot spaghetti and pancetta