I have a workaround, but it only works if you consistently use the "I've cooked this" bookmark tag. Go to mybookshelf/recipes; limit by the "I've cooked this" bookmark. Then use the main search box or filters as normal. All of the notes for the recipes should be available -- your notes & other members. Using this method, I have not found a way to limit to only MY notes.
Another method is to view all of your notes (and only your notes). Go to profile (dropdown under your login name); click on the tab for "Notes". They are organized by date, with the most recent first. This is good if you remember when you made a recipe (like for last year's Christmas party or other event). Unfortunately, the notes are not searchable here.
Also, I have made my own bookmarks for three different organization to which I regularly contribute food (work, church, and another charity organization). I tag recipes with those bookmarks when appropriate, so I can keep track of what food I bring where. It also helps my memory when someone asks me for a recipe months later.