Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
While the pasta cooks, place the diced pancetta in a cold skillet and turn the heat to medium, rendering the fat until the pancetta is golden and crisp.
Add the minced garlic to the skillet with the pancetta and sauté for 30 seconds until fragrant, then remove the pan from the heat source.
In a small bowl, whisk together the whole egg, egg whites, and grated pecorino romano until the mixture is well combined and smooth.
Reserve 0.25 cup of the starchy pasta water, then drain the pasta and immediately add it to the skillet with the pancetta and garlic.
Working quickly, pour the egg and cheese mixture over the hot pasta while tossing constantly to create a creamy sauce without scrambling the eggs.
Gradually add the reserved pasta water a tablespoon at a time while tossing until the sauce reaches a silky, velvety consistency.
Season the dish with the fresh black pepper and sea salt, then garnish with chopped parsley before serving immediately.