In a large bowl add potatoes, olive oil, onions, pepper, garlic, jalapenos and sprinkle the ranch dip mix and toss until combined.
Spray non-stick spray on foil sheets (I usually do 3) divide the potatoes evenly among the foil sheets. Fold the edges of the foil over the potatoes to form a packet.
Place packs on grill over medium heat. Cover and cook 15 minutes, rotate and cook another 15 minutes or until fork tender.
Gently open packs and sprinkle cheese over potatoes. Cover grill and wait 2-3 minutes until cheese has melted.
Remove from grill and garnish with chopped bacon, and fresh chopped parsley.