Blend it all: add lemon peel to a coffee grinder or food processor. Grind the lemon peel until it is nicely ground. Mix in salt, black pepper, garlic powder, onion powder, and thyme (if desired)
Prepare the chicken:
Cut the chicken in half: Place chicken filets on a cutting board. Carefully filet the chicken breasts into two thinner pieces.
Coat the chicken: combine flour with the prepared lemon pepper seasoning. Coat the chicken with the prepared flour mixture.
Cook the chicken: heat olive oil in a large skillet. Add the chicken to the heated oil and cook on each side until golden. You may do this in batches. Remove the cooked chicken from the skillet and set aside.
Prepare the sauce:
Make the sauce: add butter and lemon juice to the skillet where you just cooked your chicken. Scrape any browned bits until you have a smooth sauce. Place back in the chicken. Coat the chicken with the sauce.
Serve:
Serve chicken warm, drizzled with lemon-butter sauce and some fresh lemon slices.
Notes
Lemon pepper seasoning: if you do not feel like making your lemon pepper seasoning, just use one from the store. Make sure you are using quality seasoning.
If you want, you can also bake the chicken in the oven at 375℉ for 20 minutes or until the chicken reaches 165℉. I suggest that you use a skillet as the chicken is juicier.
For some extra sauce, add 2 Tablespoons of chicken stock and ½ Tablespoon lemon juice. This will give you more sauce for the chicken. Cook it until slightly thickened.