betty's german knockwurst and cabbage soup

Ingredients

• 1 large onion, diced as fine as you can
• 2 large carrots, peeled and diced fine
• 4 stalks celery, diced fine
• 4 potatoes, peeled and diced medium - small
• 6 round cut bacon (Irish bacon) not the long streaky bacon
• 6 Knockwurst sausages, sliced down the middle and cut into half moons (about 1cm/ 1/3 of an inch in diameter)
• 8 cups beef stock, made with bullion is fine that is hot/boiling
• 1 teaspoon fennel seeds
• 1 teaspoon dried marjorum
• 4 cups chopped cabbage
• 1/2 teaspoon celery salt (the secret ingredient)
• 1 teaspoon pepper to taste
• 2 teaspoons oil
• 1/4 cup chopped fresh parsley