Mix the flour, salt, sugar and yeast in a bowl. Add the water and oil, mix. Cover and leave to rise at room temperature for approx. 30 mins. Divide the dough into 5 portions, shape into balls, snip the tops with scissors. Spread onto a baking tray lined with baking paper.
Baking soda solution
Combine the water and baking soda, brush the rolls with the solution, sprinkle with sea salt.
Approx. 20 mins. in the centre of an oven preheated to 200°C.