Lightly oil two baking trays. Heat the oil in frying pan and fry the chopped onion until well browned.
Sift the flour, salt and mustard powder into a mixing bowl. Stir in yeast and herbs.
Set aside 2 Tbsp of the cheese. Add the rest to the flour mixture and make a well in the centre. Add the water with the fried onions and the oil; gradually incorporate the flour and mix to a soft dough. Add a little water if necessary.
Turn the dough onto a floured surface and knead for 5 minutes until smooth and elastic. Divide the dough in half and roll each piece into a stick about 30cm in length.
Place each bread stick on a baking tray, make diagonal cuts along the top and sprinkle with reserved cheese. Cover and leave in a warm place until doubled in size - about an hour.
Preheat oven to 220 degrees celcius.
Bake the loaves for 25 minutes or until the bread sounds hollow when tapped underneath.