Recent Topics from 1 Category

I use recent posts on my right column (using widgets).

I would also like to do a recent posts, but only those from one category.

I’m using the “sideblog” plugin for something similar. It takes one category and puts the posts in the column using a widget. But those posts don’t show up in the main blog column.

But for this other category I want it to show up in both the right column and the middle column (like normal recent posts) but only one category.

HOw do I do this with widgets?