Preheat the oven to 400 degrees F (200 degrees C). Line a sheet pan with parchment paper.
Combine oregano, parsley, paprika, garlic powder, seasoned salt, and pepper in a small bowl.
Place green beans, potato, bell pepper, broccoli, and garlic onto the prepared sheet pan. Drizzle with olive oil and sprinkle with 1/2 of the seasoning mix; toss to coat.
Place flour into a bowl. Place melted butter into a second bowl. Mix panko, 2/3 cup Parmesan cheese, and the remaining seasoning mix together in a third bowl.
Slice chicken into 1 1/4-inch strips, then coat in flour. Dredge floured strips in melted butter, dripping excess butter back into the bowl. Press into Parmesan-panko mixture until heavily coated on both sides.
