In a large saucepan, sauté the diced onion until translucent and then fry the minced meat until it is crumbly. Then add the diced carrots and potatoes and sauté. Deglaze with the vegetable stock and the canned tomatoes, season to taste and simmer for about 30 minutes over low heat.
Then add the peas and a dash of cream if you like. Simmer for another 15-20 minutes and shortly before the end of the cooking time add the leek, cut into rings.