Preheat your oven to 425°F (220°C). This high temperature will help create that perfect crispy texture.
Wash and trim the ends of your green beans. Make sure they are dry, as excess moisture can prevent them from getting crispy.
In a mixing bowl, combine the Panko bread crumbs, grated Parmesan cheese, garlic powder, kosher salt, and black pepper. Mix well until evenly combined.
In another bowl, whisk the eggs until they are well beaten. This will act as the adhesive for your breading.
Dip each green bean in the egg mixture, allowing any excess to drip off, then roll it in the Panko mixture until fully coated. Place each coated green bean on the baking sheet.
Once all the green beans are coated, drizzle the olive oil over them. Toss gently to ensure they are evenly coated for optimal crispiness.
Bake in the preheated oven for about 15-20 minutes, or until they are golden brown and crispy. Be sure to flip them halfway through for even cooking.
Once baked, remove them from the oven and let them cool slightly. Squeeze fresh lemon juice over the top for an extra burst of flavor if desired. Serve warm with your favorite dipping sauce.