Use a vegetable peeler to remove the skin from the papaya. Cut the fruit in half, then spoon out and discard the seeds. Roughly chop the flesh.
Blend the papaya with the orange juice, lime juice, Truvia and agave nectar for several minutes, until the mixture is smooth. Add the mint and pulse several times to combine, leaving visible pieces.
Pour the mixture into popsicle molds, snap on the tops, and freeze for at least 6 hours. No popsicle molds? Try using small plastic containers from yogurt or pudding cups. Cut a slit through each lid just big enough to fit a popsicle stick. Pour the popsicle mixture into the containers, cover with the lids, and freeze until the mixture is slushy enough to hold the stick upright. Push the sticks through the slits in the lids and continue to freeze until the popsicles are frozen solid.
To serve: Pull the popsicle from the mold with the handle attached. If the popsicle is stubborn, briefly submerge the mold in warm water, then try again.
Source: Sweet & Skinny by Marisa Chruchill