Boil a pot of salted water and cook the brown rice spaghetti according to package directions until al dente.
While pasta cooks, season the chicken breast with half the salt and pepper, then sear in a non-stick pan over medium-high heat until golden and cooked through.
Remove chicken from the pan, let it rest for three minutes, then slice into thin strips.
In the same pan, cook the chopped bacon until crispy, then add minced garlic and sauté for 30 seconds.
In a small bowl, whisk the egg and grated parmesan together until smooth and well combined.
Drain the pasta, reserving two tablespoons of the starchy pasta water.
Turn off the heat under the pan with bacon and add the hot pasta and reserved water, tossing to coat thoroughly.
Quickly pour the egg mixture over the pasta, stirring constantly to create a creamy sauce without scrambling the eggs.
Top the pasta with sliced chicken, the remaining pepper, and fresh parsley before serving immediately.