Cook fettuccini noodles to al-dente according to the package instructions. Before draining, reserve 1/2 cup of the pasta water and set aside.
Chicken
In a small bowl, whisk one egg and 1 tbsp milk. In another bowl, combine the panko crumbs and salt and pepper. Dip each peice of chicken into the egg wash, then into the bread crumbs.
In a large skillet over medium heat, add the olive oil and sauté chicken 3-4 minutes per side or until cooked completely through. Transfer the chicken to a cutting board and pour 2 tbsp lemon juice over the chicken. Cut into strips.
Lemon Cream Sauce
In the same skillet you used for the chicken, melt the butter over medium heat. Add the garlic and onion powder and cook for 1 minute until fragrant.
Add the heavy cream and salt. Bring the sauce to a simmer, stirring often. Lower heat and whisk often while incrementally adding in 2 tablespoons of lemon juice. Turn off the heat. Add the parmesan cheese and mix until melted.
Add the pasta and mix to combine well. Add some of the reserved pasta water if the sauce is too thick.
Serve the pasta with strips of chicken on top. Garnish with parsley. Enjoy!