Oh my goodness prepare yourself! This is SOOOO yummy. My sister in law Sarah and her husband Erik introduced us to this.
You need Romaine hearts to do this. The ones from Costco are perfect. Cut the bottom 2 inches off and wash. Then you are going to cut the hearts down lengthwise, from the top of the heart to the bottom. You want to have the two halves that look the same. After they are cut place them on a plate with the insides facing up. Drizzle with olive oil and sprinkle with garlic powder and salt.
Put them face down onto the BBQ and cook for a couple of minutes. Just until the edges are starting to wilt. Take off grill and put face up on plates. Drizzle with Caesar dressing, cut, and enjoy!