Carinthian beef soup with semolina dumplings

Ingredients

• 4 carrots
• 150 g celeriac
• 1 stick leek
• 1 onion
• 700 g lean beef for cooking
• 2 ts salt
• 1 ts peppercorns
• 1 1 / 2 L water
• 30 g butter
• 80 g durum wheat semolina
• 1 egg
• 1 pinch salt
• 1 pinch nutmeg
• 500 ml vegetable broth