Mix the starter. water, flour, and sugar. Stir until smooth, cover and leave to ferment for 8-12 hours.
When ready to make pancakes, beat the egg and add to the batter with the oil and salt. Stir. Mix the baking soda with a tablespoon of warm water, and add to the mixture.
Heat a skillet, brush with oil. Pour the batter into pancakes on the skillet: when many bubbles have formed on the surface, flip and cook the other side. Cook well, to a medium brown.
Serve the pancakes as they are cooked, or place in a warm oven until they are all cooked.