Place the meat in a bowl and sprinkle with kosher salt.
Cut the sweet pink grapefruit in half and squeeze the juice from one half of the grapefruit over the avocado.
Mash the avocado and grapefruit juice, until chunky-smooth. (or to your textural preference)
Remove the meat from both halves of the grapefruit in whichever way is easiest for you. I prefer to cut them into quarters and cut the meat out of each quarter and then chop it.
Cut the grapefruit meat with a small knife and add it to the avocado mixture
Slice a jalapeno in half - remove the seeds and ribs (unless you like heat) and dice it.
Add the jalapeno to the avocado mixture.
Peel and dice a small yellow onion, add to the mixture.
Top with cumin and mix.
Chop cilantro leaves and measure out 1 Tbsp, add to avocado mixture.
Serve.
Notes
Make sure the grapefruit is sweet, and this guacamole will wow your friends and family with it's unexpected flavor.