Heat a large non-stick frying pan until hot, add vegetable oil. Add about half the mince and fry it over a medium heat for 4-5 minutes until browned. Stir it with a wooden spoon and press out any lumps while it is frying. Add the browned mince into a bowl. Add the remaining raw mince into the pan and add the garlic, ginger and oregano. Fry it as you did with the previous batch, then return all the mince to the pan and mix it together.