Cook sausage in a medium skillet until browned; drain. Set aside.
Separate crescent dough into 8 triangles; place triangles with elongated points toward center in a greased 12 inch pizza pan. Press bottom and sides to form a crust. Seal perforations.
Spoon sausage over dough; sprinkle with thawed hash brown potatoes and cheddar cheese. Combine eggs, milk, salt and pepper; pour over sausage mixture. BAKE at 375 for 25 minutes. Sprinkle with Parmesan cheese and bake an additional 5 minutes. Grarnish with pimentos and fresh oregano.