Fire up your grill for direct and indrect cooking.
Place the cedar plank over direct heat and grill until it is singed. Flip and singe the other side. Remove and let cool slightly.
Unwrap the cheese and place in the center of the plank. Top with the jelly, spreading it out over the top. Add the jalapeno slices.
Return the plank to the grill, this time over indirect heat. Grill until the cheese is starting to melt, 8-10 minutes.
Remove the plank from the grill. Serve with crackers.