Pre heat oven to 180 C.
Place all of your dry ingredients into a food processor and pulse until it becomes a smooth flour like consistency.
Transfer your flour to a large mixing bowl, add the egg whites, vinegar and olive oil, stir together, making a big clump.
Pour in 450ml of the boiling water and quickly stir it around. It should come together into a play dough type consistency. If you need to add a bit more water you can.
Use another bowl filled with water to wet your hands, then grab a large handful of mixture and shape into a palm sized circle shape, flattening it to around the same thickness of your palm. Similar to making a hamburger pattie.
Working quickly, repeat the process to make 12 rolls, placing them onto a tray lined with baking paper. Pat the tops of them with water to moisten and sprinkle some sesame seeds on top, pressing them in a bit.
Place the tray into the oven and bake for 55-60 minutes. You’ll know they are cooked when they feel hollow when tapped on the underneath.
Allow to cool completely before slicing.