HEAT oven to 350°F.
COOK meat with seasoning mix as directed on package. Remove from heat; stir in beans. Set aside. Mix sour cream and 1-1/2 cups cheese.
SPREAD 1/4 cup salsa onto bottom of 13x9-inch baking dish sprayed with cooking spray; top with 4 noodles. Cover with layers of half each of the meat mixture, corn and sour cream mixture. Top with layers of 4 more noodles and 1/4 cup of the remaining salsa; cover with remaining meat mixture, corn and sour cream mixture. Top with remaining noodles and salsa; cover.
BAKE 40 min. Sprinkle with remaining cheese; bake 15 min. or until lasagna is heated through. Let stand 5 min. before serving.