I prefer rather simple bread - nothing fancy with some exotic type of corn, just a plain whole wheat bread made of rye and wheat. What I really like is a thick, dark, splintering crust. :)
First off, you don't need fancy equipment like a baking stone for the oven or a special form of some kind - your average gratin form/cassarole top will do just fine. What you actually need is patience as sourdough bread is a question of letting the chemistry really work. You need time and temperature and that's essentially it. If you already have a sourdough culture (if you don't: get one here: http://www.sourdo.com/culture.htm - don't use the stuff from the store, it usally has the wrong chemistry and contains additives) you can just start to bake bread. If you don't, see at the end of the page how to cultivate your own sourdough culture. It'll take about 3-5 days.
There are some things to consider, though:
Stage I: In the afternoon, start with a mixture of 2-3 spoons full of sourdough culture, mixed with 100gr rye flour and 110gr plain water. Put it in some bowl, cover it with a kitchen towel and put it somewhere warm (but below 35°C!) The first and rather warm stage lets the yeast fungi grow nicely you'll need to rise the rather heavy dough later on.
Stage II: Shortly before you go to bed, the sourdough gets another feeding and is kept over night at a little lower temperature around 20°C-25°C. That's for for growing some acid bacteria like milky acid for example. (Hence the sour in sourdough - the pH gets rather low even under 4 - try and test it!)
Stage III After you woke up the sourdough gets its last feeding and is kept another 6 hours at a rather low temperature around 18°C - 20°C. If the starter bubbles and grows - perfect. If it doesn't: Doesn't matter, will rise later.
In the late noon or early afternoon (it's 18-24 hours later) mixing and kneading the dough but first:
KEEP 3-5 SPOONFUL SOURDOUGH FOR THE NEXT BREAD!
Set aside the 3-5 spoonful and keep it in the fridge. You do this every time you went trough the three feeding and warming and growing stages. If you keep the culture properly, it gets stronger and stronger and never dies. There are cultures around over a hundred years old - if you can get some hand made from your grandmother's or someone else baking bread: take it, care for it. Now let's mix and knead the main dough made of:
Besides that keep about 100gr - 150gr cold water in reach to keep your hands wet and avoid sticking in the dough.
KNEAD properly! If you use any flour which contains gluten (wheat and splet mostly), you'll have to knead until the gluten works properly. 10-15 minutes is definetely not too long. If you make a pure rye bread, you don't have to knead longer than 5 minutes. Rye is exceptionally sticky and annoying to knead, that's why you have set aside another 100gr cold water - wet your hands often while kneading. It'll keep the dough moist and your hands clean.
Let the dough rest for half an hour and knead another round. Especially if you use coarsely milled flour or whole wheat bran or oat bran - they need to soak a little or your bread tastes dry.
Now put the dough into a bowl onto some baking sheet/baking paper (those non-sticky sheets of paper), cover it with a towel, avoid draft and cold air and let it rise in the oven at something like 35°C-40°C. In my oven (which is old and cheap) it takes 50°C on the scale and about 3-4 hours until the dough has risen to the double amount (filling my bowl completely).
Now it's time to heat up the oven to 250°C - as hot as possibly. Heat up your baking stone OR the the gratin form/casserole top with it, it'll help to keep the heat and if you don't use much wheat in your dough and/or have been too lazy to knead the gluten properly (yes, I mean you. ;), you'll need the casserole top to hold the dough in shape.
If the oven is hot, hold the baking paper with the dough in it with one hand on all four sides, open the oven with the over and let the entirely thing slip into the form (onto the stone) WITH the paper. Pour half a cup of water onto the oven floor and close it fast. Water again every time you lower the baking temperature. My oven with about 1100gr bread takes:
25 minutes at 250°C, 25 minutes at 225°C and another 35 minutes at 200°C.
After the first 25 minutes, before watering the second time also pull back the paper which might have covered parts of the top side of the bread.
The bread is finished if knocking on it with a spoon sounds hollow and it looks nice bready and all and smells delisheeiously. ;)
As you've finished the bread around the evening: It's really good if you let it rest over night and cool it properly - directly from the oven is just too fresh.
If you bake for the weekend:
You start on Thursday afternoon at around 5 pm. Second feeding is before bedtime - let's say around 11 pm or midnight. Friday morning at 7 am, you'll do the last feeding. Make the dough at around 4 pm on Friday, let it rise until around 7 pm, bake at 8 pm - bread will be ready in the evining and at viola - Saturday has nice freshly baked bread. :)
Variations: As long as you grow and cultivate the sourdough culture with rye, you can bake essentially with every kind of grain you can think of. If you just start out baking bread, start with rye and wheat mixed - wheat helps stabilizing the dough due to the gluten. I also like something like 60% rye - 10% oat bran - 30% wheat mixed (all for the flour part - the sourdough itself is rye anyway..). Seeds like sunflowers, sesame, hemp or pumpkin can be added while kneading or spread on top of the bread. In many regions of Germany, barley is also a common grain to mix into the dough.