In a large bowl, combine flour, egg, NIDO milk, vegetable oil and salt. Rub with your fingertips until the mixture resembles fine breadcrumbs. Gradually add water and mix to form a soft dough.
Divide the dough into 2 equal portions. Cover and keep aside for 1 hour.
Combine the minced meat, onion, tomato, black pepper and MAGGI® Chicken Bouillon . Mix well and set aside.
Turn out the first piece of dough onto a lightly floured work surface. Knead the dough and roll it out into a greased 32cm round oven tray.
Carefully spread the meat mixture over the dough.
Roll out the second piece of dough and place it over the meat to cover. Tightly press the edges and brush the top with the extra egg.
Bake in a 170°C oven for 35-40 minutes or until the top is golden and the meat is cooked.