Start by preheating the oven to 425°F. I line my baking sheet with parchment paper or use a wire rack on top. Cut the chicken into even, bite-sized pieces so they cook at the same rate.
I set up three bowls: one with flour, one with whisked eggs, and one with panko, parmesan, garlic powder, paprika, salt, and pepper. This makes the coating process smooth and less messy.
Each piece of chicken goes into flour first, then egg, and finally the breadcrumb mixture. I gently press the crumbs onto the chicken so the coating sticks well and bakes evenly.
Place the coated chicken pieces on the baking sheet, leaving space between them. I lightly spray them with olive oil spray. Bake for about 15 minutes, flip them, then bake another 10–15 minutes until golden and cooked through.
While the chicken bakes, I melt butter in a small saucepan over low heat. I add minced garlic and cook just until fragrant, not browned. Then I stir in grated parmesan and remove from heat.
Once the chicken is done, I transfer it to a large bowl and pour the warm garlic parmesan sauce over it. I toss gently until every piece is coated, then sprinkle with parsley and red pepper flakes if using.