Winter Vegetable Soup

• 1/8 sliv
• 1,200 ml chicken stock
• 375 gr potatoes (diced)
• 190 gr carrots (sliced)
• 180 gr leeks (diced)
• 180 gr onions (diced)
• 140 gr cabbage (shredded)
• 100 gr celery (diced)
• 60 gr spinach (rinsed)
• 34 gr butter (unsalted)