01 -
Heat olive oil in a saucepan over medium heat. Add the chopped onion and sauté until softened and translucent, about 5 minutes.
02 -
Incorporate minced garlic, stirring for 1 minute until fragrant. Add curry powder, paprika, and cinnamon, toasting for 30 seconds while stirring to develop flavor.
03 -
Stir in ketchup, tomato paste, broth, apple cider vinegar, honey, Worcestershire sauce, brown sugar, mustard, salt, black pepper, and cayenne if using. Bring to a simmer, then reduce heat to low, cover, and allow to cook gently for 15 minutes, stirring occasionally.
04 -
Use an immersion blender directly in the saucepan, or transfer sauce to a countertop blender, processing until smooth. Let cool fully and refrigerate for at least 4 hours or overnight for optimal flavor development.
05 -
If working with raw bratwurst, poach in barely simmering water until fully cooked through. Then, finish by grilling, pan-frying, or air frying sausages until exterior is golden and crisp.
06 -
Slice sausages into bite-sized pieces. Arrange on serving plates, generously spooning curry ketchup over the top. Finish with a sprinkling of curry powder. Serve immediately.