They are actually very easy to do, just requiring an overnight ferment, and the result is pretty good, although I say so myself. Here are the details:-
§ 130g Sourdough Starter
§ 180g Whole Wheat Flour
§ 113g Sunflower Oil
§ 2 Eggs
§ 1 teaspoon Salt
§ 1 teaspoon Bicarbonate of Soda
§ 100g Sugar
§ 100g Fruit or Nuts or Seeds or Choc Chips (optional)
1. The night before gently mix together starter and flour until just combined. It looks like breadcrumbs if your starter is at 100% hydration. Allow to ferment for 8 to 12 hours.
2. In the morning, preheat the oven to 190 degrees C and blend in all the other ingredients, being careful not to mix too much.