Well the Old Testament Institute manual is a good place to start:
http://www.ldsces.org/inst_manuals/f..._32489_eng.pdf
A quick web search returns this website:
God’s Dealings With Joseph (Genesis 37.2b-50.26) - The Book of Genesis - A Commentary which has some interesting insights, but is not LDS.
And you can always go to byu.tv, select "Scripture Discussions" and browse to the Old Testament. And of course, you can always (if it's available near you) go to Institute
