Bread

Here's my schedule for it:

• day 1, morning: make the stiff starter
  
• day 1, evening: make the dough
  
• day 2, evening: fold the dough and shape the loaf(s) (quantities given yield one big loaf, I multiply by 1.25 for the two above)
  
• day 3, morning: bake the loafs.
  
  

So not quite 4 days, still fairly long but it fits well around work and life.