Ambrosia Maple natural edge bowl from a log given to me by Preston.
bottom view
Top view
Started with a blank cut round on the bandsaw, a flat spot made under the bark with a forstner bit.
And mounted between centers using a steb center on the head stock side.
Turned a tenon on the bottom and
shaped and cleaned up the outside.
Then reverse mounted it in the four jaw scroll chuck. 
Final inside: face-on view
Side view.