01 - Bring 2 1/2 cups water and 1/2 teaspoon salt to a boil in a saucepan. Stir in orzo and cook until al dente, about 8 to 9 minutes. Drain thoroughly and allow to cool slightly.
02 - In a large mixing bowl, blend cooled orzo with 1 cup grated Parmesan cheese, green onions, parsley, minced garlic, whole milk, melted butter, eggs, black pepper, and red pepper flakes. Mix well until homogeneous.
03 - Portion about 1/4 cup of the mixture for each cake. Shape into 8 even patties and set aside.
04 - On a plate, combine panko breadcrumbs with 2 tablespoons grated Parmesan. Gently coat each cake in the breading mixture, pressing to ensure adherence.
05 - Heat olive oil in a large nonstick skillet over medium heat. Fry patties in batches for 3 to 4 minutes per side until golden brown and crisp. Drain on paper towels.
06 - Garnish cakes with additional parsley if desired. Serve warm as a side dish or light entrée.