On 4 tortillas, layer chicken, cheese and 1/4 cup cilantro. Top with remaining tortillas. Brush top of each quesadilla with about 1/2 teaspoon oil.
Heat 12-inch nonstick skillet over medium heat. Place 1 quesadilla in skillet oil side down; brush top side with about 1/2 teaspoon oil. Cook about 1 minute or until light golden brown.
Carefully turn quesadilla; cook 1 minute longer or until golden brown. Repeat with remaining quesadillas. Drizzle quesadillas with dressing and salsa. Sprinkle with 1 tablespoon cilantro. To serve, cut into wedges.