I did a google search with the term: semi block pepper and that led me to this site. There are some Hungarian similar to what you describe.
I also found a site that described a Hungarian Medium Hot Block approximately 4" long and 3" wide with 4 lobes. Could that be it? You might want to try these sites too.
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.