Preheat oven to 400 F. In a shallow dish, whisk together egg and milk. In another shallow dish, combine flour and Greek seasoning. Place breadcrumbs in another shallow dish.
Dip each green bean in the egg mixture, roll in the flour mixture, dip back into the egg mixture, fully coat in the breadcrumbs. Place onto a large greased baking sheet. Bake for 20-25 minutes.