|Just add chocolate.|
Stamping the rose four times (first onto the ATC itself, then onto two shades of green paper, and finally onto bright red) allowed me to then cut and piece together the image. This is one way to achieve deeply saturated color.
I stamped "Love" in sepia to bring it to the fore, but unfortunately I did this prior to affixing the rose. A better plan would've been to stamp that part last! I corrected it by filling in the "L" with a colored pencil.