Mix together the first 6 ingredients (whole wheat flour through sesame seeds).
Add the melted butter and buttermilk; mix well.
Form batter into several balls the size of a tennis ball.
Roll each out as thinly as possible on the back of an ungreased cookie sheet.
Score into 2" x 2" squares. Do not separate.
Bake at 350°F for 10-12 minutes.