For crisp tortilla:
Preheat oven to 350 degrees. Spray both sides of flour or corn tortillas (6 in) with cooking spray, then place in a single layer on baking sheet. Bake 10 minutes or until crisp and lightly browned.
Prepare rice in large saucepan as directed on package. Add beans, corn and Taco Seasoning; mix well. Cook 5 minutes or until heated through, stirring occasionally.
Top 10 crisped tortillas evenly with rice mixture, lettuce, Taco Sauce and cheese.
Makes 5 servings, 2 tostadas each.