Cut the potatoes into small cubes and fry them. Chop the onions, carrots and peppers and sauté briefly. Mix in the paprika powder, tomato paste and sugar and roast for 3 minutes. Pour in enough vegetable stock to just cover the vegetables. Use marjoram, salt, pepper and nutmeg to taste. Let the goulash simmer over medium heat for 15 minutes. Season again to taste and thicken with a little cornstarch. Refine with soy cream.