Bread board mortising

[Lambo41]

I’m in the process of making a hickory barn wood style table.  I need to join bread board ends.  The pieces are @ 9” wide x 1/2” thick.  I was going to use mortise and tenon process but I don’t know how I’m going to make a 6” or so deep mortise.  Any ideas.

[gee-dub]

There will be a challenge in supporting any "elbow leaning" on a 9" breadboard.  Why so wide . . . and a better question, why so thin?  What is the thickness of your table top?  With these answers we can provide you better feed back 

[RichardA]

When you answer GeeDub, answer this...  Where is the mortise going to be?  In the breadboard or the table top? And again why so thin?

[gee-dub]

Here are a few methods but, with your dimensions there will be a challenge in execution and in suitability.

This is pretty typical:

This is the method I mostly use:

This is a Domino variation:

This is a breadboard that is probably not well scaled to the Dominos intended to support it.  The first goof to rest a hip on the end of the table during a family gathering will probably get a surprise:

Despite using the "thirds" rule of thumb for sizing tenons or a spline for 1/2" material there is just not a lot of material left to support the joint.