If you need read-write access to the input value, do not add the readonly attribute. It is ignored if the value of the type attribute is hidden, range, color, checkbox, radio, file, or a button type (such as button or submit).
But of course there are dishes which can be considered as typical Australian food. People eat a lot of red meat, especially beef. And no wonder, as the beef in this country is among the best in the world. Lamb is also a favourite food and so is pork. Chicken and fish are very important in Australian diet.
There are more kangaroos than people in Australia, so it actually makes sense economically, nutritionally and environmentally. Still, it's not common for people to eat it, at least going by the selection sizes at my local grocery store kangaroo probably takes up about 30% of the shelf space that other meats use.