Light your charcoal in the KUDU and let them burn to embers with a layer of white ash.
Cut the stem off the jalapenos, removing the pit and seeds. Take a small knife and cave a line down one side making it easier to remove the pit and seeds.
KUDU hack: to reduce the heat of the jalapenos blanch them by boiling in water for 5 minutes. Remove them immediately and place them in a bowl of ice water.
In a small bowl combine cream cheese, green onion, garlic powder and cheddar cheese. Stuff into jalapenos. Place them into a jalapeno grill holder.
Adjust your grill height over the ember at medium-high heat. To locate medium heat, place your hand over the embers and find the height you can count to 3 or 4 before having to remove your hand from the flame. This is the height for medium-high heat (approx. 500 degrees).
Move your KUDU grill grate to that height and place the jalapeno holder on the grill.
Once the cheese has melted remove from grill. Serve.