Maguire's Hill 16 Irish Potato And Leek Soup

• 1 leek (white)
• 1 cheddar for crumbled (shredded garnish)
• 1,100 gr potatoes (peeled)
• 1,900 ml chicken stock
• 950 ml milk (whole)
• 475 ml cream (heavy)
• 60 ml cornstock
• 8 gr pepper (white)