Heat grill. Mix cheese and ranch dressing together in a small bowl; set aside. Place jalapeños on heated grill; roast about 4 minutes per side or until peppers begin to blister. Remove from heat and allow to cool about 10 minutes. After the jalapeños are cool, and reserving stem end, cut jalapeños in half lengthwise and remove seeded core. Spoon cheese mixture into jalapeños. Arrange stuffed chilies on a small heatproof skillet or pan. Return to grill and heat 5 minutes or until cheese is melted. Drizzle with barbecue Sauce. Serves 8.
*For a milder version, substitute 4 poblanos for the jalapeños.