Colcannon And Corned Beef Soup

• 3 leeks
• 2 golden delicious apples
• 1 prepared mustard
• 1 dark green
• 2,400 ml low-sodium chicken broth
• 575 gr baking potatoes
• 350 gr deli corned beef
• 260 gr green cabbage
• 240 ml water
• 230 gr onions