Preheat the oven to 475F

In a food processor, combine: panko, cheese, rosemary, garlic powder and black pepper;

process on high for a few seconds until thoroughly combined

In a shallow bowl, whisk together the egg and mustard

Prepare the assembly line:

Plate with corn starch

Bowl with egg mixture

Plate with seasoned breadcrumbs

Place pieces of chicken in corn starch first, then egg, then breadcrumbs until all are fully coated

Place breaded chicken on the baking sheet with a rack

Bake for 20-25 minutes until cooked through

After 15 minutes of baking sprinkle chicken with olive oil to achieve a golden brown crust.