1Heat oven to 375°F. Spray 16 mini muffin cups with cooking spray. Sprinkle grated Parmesan cheese evenly around side and in bottom of cups.
2On cutting board, cut out 2 (2 1/2-inch) rounds from each tortilla. Push 1 round into each muffin cup to form tortilla cup.
3Bake 5 minutes or until browned. Meanwhile, in small bowl, gently mix chicken and dressing.
4Divide lettuce evenly among cups. Top each with chicken mixture. Sprinkle with corn, 1/4 cup Parmesan cheese and the tomatoes. Serve immediately.