Under their own brand name of Deutsche Kuche, Aldi sells a smoked knackwurst sausage manufactured for them by Salm Partners, of Denmark, WI.
In Germany, “knackwurst” can refer to a wide variety of sausages, depending on the region of manufacture. In the US, it generally refers to a plump, mildly seasoned pork sausage in a natural casing.
Aldi’s are VERY mild, similar to a hot dog, and they are packed into beef collagen casings. It’s a very fine “grind.”
I like more flavor and/or spice, so these aren’t for me, but they are a good value.
Aldi Smoked Knackwurst Review