Heat the margarine in a large pan over medium heat
Add the onions and carrots, sauté for 5 minutes until softened
Sprinkle the curry powder and flour over the vegetables, stir and cook for 1 minute
Pour in 500 ml water, bring to a boil, then stir in the broth
Reduce heat and simmer the sauce for 15 minutes
While the sauce simmers: squeeze out the soaked rolls and knead them with the minced meat and egg
Season the meatball mixture with salt and white pepper, then shape into small balls
In a separate dry pan over medium heat, roast the sesame seeds for 2–3 minutes until golden brown, stirring occasionally
Heat the oil in another pan over medium-high heat, then fry the meatballs for 10 minutes until golden and cooked through (internal temperature 63 °C / 145 °F)
Stir the crème fraîche into the curry sauce, then taste and adjust seasoning with salt and white pepper
Add the meatballs to the sauce
Chop the parsley
Transfer the meatballs and sauce to a serving dish and sprinkle with the toasted sesame seeds and chopped parsley