Preheat the oven to 400°F (200°C).
- Pound the chicken breasts to even thickness. Season both sides with salt and pepper.
- Set up three shallow bowls: one with flour, one with beaten eggs, and one with a mixture of Pecorino, panko, garlic powder, onion powder, and lemon zest.
- Dredge each chicken breast in flour, then dip in egg, and coat thoroughly with the pecorino-panko mixture.
- Heat olive oil in an oven-safe skillet over medium heat. Sear the chicken for 2-3 minutes per side until golden brown.
- Transfer the skillet to the oven and bake for 12-15 minutes, or until the chicken is fully cooked.
- While the chicken bakes, make the sauce: In a saucepan, melt butter, then stir in lemon juice, chicken broth, and heavy cream. Simmer until slightly thickened.
- Taste and adjust seasoning with salt and pepper.
- Remove the chicken from the oven and let it rest for 5 minutes.
- Serve the chicken topped with warm creamy lemon sauce and garnish with chopped parsley if desired.