Cut the chicken in half to make 4 fillets. Place on the cutting board and pound to 1/2 inch thick if needed.
Season the chicken with lemon pepper on both sides.
Combine the flour, Pecorico Romano, garlic powder and onion powder in a shallow bowl. Set aside.
Heat oil in a skillet or non stick pan over medium-high heat. Once it is hot, dredge the fillets in the flour mixture, coating completely. Shake off excess. Fry fillets in batches of two for 8 minutes ( 4 minutes per side) or until golden brown. Transfer to a plate.
To the same skillet, add the minced garlic and cook until fragrant, about 1 minute. Add the chicken stock ( or broth) and cook for 5 minutes on high to reduce down, while whisking occasionally.
Reduce the heat to medium-low and add the half and half. Simmer on low until slightly thickened. Add the Pecorino Romano cheese and cook until it is melted. Taste test and season with salt and pepper.
Stir in the lemon juice and return the chicken back to the sauce to heat through on low for 1-2 minutes.
Garnish with fresh parsley.
Serve over spaghetti.
Enjoy!