If using store-bought Bratwurst, cook them according to package instructions. They can be grilled, pan-fried, or baked until fully cooked and browned.
In a saucepan, heat the vegetable oil over medium heat.
Add the finely chopped onion and cook until softened and translucent, about 5 minutes.
Stir in the minced garlic and cook for another 1-2 minutes until fragrant.
Add the ketchup, tomato paste, and apple cider vinegar to the saucepan. Stir to combine.
Add the curry powder, paprika, sugar, ground cumin, and ground coriander. Stir well.
Simmer the sauce over low heat for about 10-15 minutes, stirring occasionally. Adjust seasoning with salt and black pepper to taste.
Slice the cooked sausages into bite-sized pieces or keep them whole.
Pour the Curry Ketchup Sauce over the sausages or serve it on the side for dipping.
Optionally, garnish with additional curry powder or chopped fresh parsley.
Enjoy your meal!