canvas: change the background of a text item

Is there a way to change the background of a text item on a canvas?
I can change the color of the text via -fill, but I found no way to
change the background color of the text:

  pack [canvas .c] -fill both -expand yes
  # red text on yellow background
  .c create text 100 100 -text "Example text" -font {Helvetica 20} -fill red
 
=> how to change the background of the text field to yellow?
   i.e. the same as ".c configure -background yellow", but restricted
   to the area of the text.
  
TNX
R'