Heat oven to 375°F. Spray cookie sheet with cooking spray. Place 2 tortillas on cookie sheet. Spread half of barbeque sauce with pork over each tortilla. Sprinkle half of the pickle relish over each. Top each with 1/4 cup cheese and remaining tortillas. Spray top of each with cooking spray.
Bake 10 to 12 minutes or until tortillas are lightly browned and filling is hot.
Remove partially baked quesadillas from oven. Immediately drop 4 teaspoons cheese by 1/4 teaspoonfuls around edges of quesadillas, spacing evenly and making 8 piles of cheese on each. Top each pile of cheese with 1 olive half to resemble wart.
Return to oven; bake about 1 minute longer or until cheese is melted. Let stand 5 minutes before serving. Cut each quesadilla into 8 wedges.