Pour oil onto one side of a tortilla. Place second tortilla over oiled side of first tortilla, and rub tortillas together to spread oil evenly over both tortillas.
Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add corn; cook 4 minutes or until lightly browned, stirring occasionally. Place corn in a bowl. Add onion, sun-dried tomato, salt, and pepper to pan; sauté 1 minute. Add to the corn mixture. Wipe pan with paper towels; recoat with cooking spray.
Heat pan over medium-high heat. Place one tortilla, oiled side down, in pan. Sprinkle 2 tablespoons cheese over tortilla; top with corn mixture. Sprinkle with remaining 2 tablespoons cheese; top with remaining tortilla, oiled side up. Cook 2 minutes on each side or until cheese melts and tortilla is crisp. Cut into 4 wedges.