You will find instructions on how to make the frosted glass panel here [http://www.home-dzine.co.za/crafts/craft-frosted-framed.htm], and the frame is built around the completed glass panel.
The nice thing about using tongue and groove for the picture frame is that it already has a pre-cut channel down one edge, which makes it easy to mount our piece of glass.
If you get confused when cutting the angles, cut one at a time so that you can fit the frame together as you cut each end.
You don’t need specialised tools to cut mitred edges for picture frames – a mitre box and backsaw do the job just as well.
A few light taps from a rubber mallet will help on areas that need a bit of coaxing, but only tap lightly to tease the glass into the grooved slot.
Apply a small bead of No More Nails adhesive to the mitred ends and attach corner braces with 12mm wood screws to hold frame sections together.
Leave the adhesive to cure overnight.