Leek And Potato Soup With Country Ham

• 10 potatoes (peeled)
• 1 salt pepper
• 2,400 ml chicken stock
• 270 gr cabbage thinly (red sliced)
• 230 gr ham (cooked cut into)
• 45 ml olive oil
• 3 gr caraway seeds
• 2 gr cumin seeds
• 2 gr fennel seeds
• 6 slices leeks thinly (sliced)