Peel and chop the garlic. Slice the sausages. Heat oil in a pan. Fry the sausage slices for about 4 minutes, turning them over. Take out.
Sauté garlic in hot frying oil. Add sugar and let it caramelize. Stir in tomato paste and sweat it on. Deglaze with tomato juice, bring to the boil and simmer for about 5 minutes.
Prepare vegetables according to package instructions, add to the tomato sauce with the slices of sausage. Season with salt and pepper. Cook the spaetzle in boiling salted water for about 1 minute. Drain and let drain. Arrange the sausage pan. Serve with spaetzle.