Brush on a thin layer of gesso over a piece of colored card stock.
Quickly, as the gesso is still wet, press a stamp firmly into the gesso a lift off and wipe the gesso off the stamp between each time used to press into the gesso. Do not allow the gesso to dry on your stamps. Let dry.
Piece on the left was done on light green card stock and the one on the right was done on red card stock. You can leave the backgrounds like this or
you can color the gesso with dye ink.