Mix cottage cheese, eggs, Parmesan cheese and oregano. Set aside.

In medium skillet over medium-high heat, cook beef until browned, stirring to separate meat. Pour off fat. Stir in tomatoes & green chilies, picante sauce, chili powder and corn. Heat through.

Arrange 6 tortillas in bottom and up sides of 3-quart shallow baking dish. Top with half of the meat mixture and all the cheese mixture. Top with remaining 6 tortillas and remaining meat mixture.

Bake at 400°F for 30 minutes or until hot. Sprinkle with Cheddar cheese. Let stand 10 minutes. Serve with additional picante sauce.