Preheat Wolf charbroiler or Wolf outdoor grill for 15 minutes. Place tomatillos and poblano on grill for 5 minutes, turning occasionally. Remove and cool. To poblano, remove charred skin, seeds and stem.
To Make Avocado Dressing:
Place tomatillos, poblano, water, cilantro, avocado, parsley, lime juice and garlic in blender or food processor. Blend on medium-high until combined. Set aside.
Brush romaine with olive oil and season with salt & pepper. Place on hot grill, cut side down for 30 seconds or until grill marks appear. Remove and cut in half again lengthwise. Place tomatoes on grill for 10 to 15 seconds or just until charred. Top with cheese and plantain chips.
Serve romaine warm with tomatoes, cheese and chips. Drizzle avocado dressing sauce over all.