Bavarian Green Beans and Sausage Soup

Name: Bavarian Green Beans and Sausage Soup
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Cuisine: European, German
Ingredients: 1 stick leeks, (sliced); 2 medium red onions, (minced); 2 large red skinned potatoes; 200 g cut green beans, (fresh or frozen ); 2 tbsp. vegetable oil, or lard; 1.5 liters water, (more or less as needed); 2 tbsp. celery leaves, (minced); 1 tbsp. tomato puree; pinch of nutmeg; sea salt and white pepper to taste