In a a large pot bring water to boil.

Wash the cabbage and remove the core from the inside. Cut cabbage in half and first slice; then dice.

Put into the water and cook for 1 hour on medium heat. Until the cabbage will become softer.

Peel and dice potatoes, slice carrots and celery. Add it to the soup.

Peel the onion, cut in half and add it to the soup.

Cook for another 30 minutes, until all vegetables will become soft.

Add salt and pepper.

In the frying pan melt butter and cook tomato paste on low heat for 2 - 3minutes. Add it to the soup. Mix very well and cook for couple minutes.

Add parsley.