In large skillet, brown ground beef until thoroughly cooked; drain. Add 1 ½ cups water, 3/4 cup milk and 2 tbsp margarine to skillet with beef. Bring to a boil.

Slowly stir in pasta, seasonings and chili powder. Return to a boil. Reduce heat to medium. Gently boil uncovered, 7 minutes, stirring occasionally.

Stir in salsa and corn; return to a boil. Boil 1 to 2 minutes or until pasta is slightly firm, stirring frequently. Remove skillet from heat. (Sauce will be thin.) Sprinkle cheese and topping over pasta. Let stand 3 to 5 minutes for sauce to thicken. Sprinkle with cilantro, if desired.