Make 3-4 shallow diagonal cuts on each side of the sausages using a sharp knife to prevent them from splitting during cooking and to allow the curry sauce to penetrate the sausage better.
Grill or fry the sausages over medium heat until they are fully cooked and browned on the outside, about 10 minutes, turning occasionally for even cooking. Set aside to rest.
Combine and stir ketchup, curry powder, Worcestershire sauce, sugar, onion powder, paprika, chili powder, salt and pepper in a medium-sized saucepan over medium heat.
Allow the sauce to simmer for about 10 minutes, stirring occasionally. This will help the flavors meld together and the sauce thicken slightly.
Slice the cooked sausages into bite-sized pieces and arrange them on a plate. Generously spoon (basically drown) the curry sauce over the sliced sausage. Sprinkle more curry powder on top of the sauce if you want to eat it like the Germans do. (optional)
