Irish Kielbasa Chowder

1 pound kielbasa, 1/8 " slices
1 medium onion, chopped
4 potatoes
2 cups water, salt and pepper
1 small cabbage, shredded
3 cups milk
3 teaspoons flour, stirred into milk
1 cup sharp cheddar cheese, shredded

Boil 1st 4 ingredients and cook for 20 minutes.
Add cabbage, cook 10 minutes until tender.
Add milk/flour mixture, simmer 10 minutes.
Add cheese, simmer 10 minutes.