Brown ground beef in a large skillet over medium heat, stirring until it crumbles and is no longer pink; drain. Stir in corn and next 4 ingredients; bring to a boil. Reduce heat, and simmer, stirring often, 5 minutes. Remove from heat, and set aside.
Stir together cottage cheese and next 4 ingredients.
Arrange 6 tortillas on bottom and 1 1/2 inches up sides of a lightly greased 13- x 9-inch baking dish. Spoon half of meat mixture over tortillas; top with cottage cheese mixture. Arrange remaining tortillas over cheese mixture; top with remaining meat mixture.
Bake at 375° for 30 minutes or until thoroughly heated. Remove from oven, and sprinkle with Cheddar cheese. Let stand 10 minutes before serving.