Bring a large pot of salted water to a boil and cook the whole wheat spaghetti until al dente according to package directions.
While the pasta cooks, sauté the diced pancetta in a large skillet over medium heat until the fat renders and it becomes crispy and golden brown.
Add the minced garlic to the skillet with the pancetta and cook for 1 minute until fragrant, being careful not to burn it.
In a small mixing bowl, whisk together the whole egg, liquid egg whites, and grated parmesan cheese until the mixture is well combined.
Reserve 0.25 cup of the starchy pasta cooking water, then drain the spaghetti and add it directly to the skillet with the pancetta.
Stir in the frozen peas and the reserved pasta water, then immediately remove the skillet from the heat source.
Quickly pour the egg and cheese mixture over the hot pasta, tossing constantly with tongs to create a creamy, emulsified sauce without scrambling the eggs.
Season the dish with freshly cracked black pepper and sea salt, then serve immediately while the sauce is glossy and warm.