What is the blessing recited on tempeh?

As far as I know, tempeh is made primarily of soybeans molded into a solid homogeneous mass where the individual bean is no longer clearly identifiable. The blessing therefore becomes Shehakol, the blessing made on not recognizably organic items.

Needless to say, as tempeh is a cooked product, you must ascertain that it has proper kosher certification.

I hope that I've been helpful today.

Yours truly,

Rabbi Menachem Posner