Bring a medium pot of salted water to a boil and cook the whole wheat spaghetti according to package directions until al dente. Reserve 2 tablespoons of the pasta water before draining.
While the pasta cooks, slice the chicken breast horizontally into two thin cutlets and season both sides with sea salt and black pepper.
In a shallow bowl, whisk the egg. In a second shallow bowl, mix together the almond flour and grated Parmesan cheese.
Dip each chicken cutlet into the whisked egg, then dredge in the almond flour mixture, pressing firmly to ensure an even coating.
Heat the olive oil in a non-stick skillet over medium heat. Add the chicken cutlets and sear for 3-4 minutes per side until the crust is golden brown and the chicken is cooked through. Remove and set aside.
In the same skillet, add the minced garlic and cook for 30 seconds until fragrant. Toss in the cooked spaghetti, lemon juice, lemon zest, and reserved pasta water.
Stir in the fresh chopped parsley and serve the chicken cutlets over the warm lemon pasta.