BROWN meat with onions in large skillet. Meanwhile, mix Neufchatel, cottage cheese, 1-1/2 cups mozzarella, 1/4 cup Parmesan and egg until blended.
DRAIN meat; return to skillet. Stir in spaghetti sauce, tomatoes and oregano; simmer 5 min. Remove from heat. Spoon 1 cup meat sauce onto bottom of 13x9-inch baking dish; top with layers of 3 lasagna noodles, 1 cup cheese mixture and 1 cup meat sauce. Repeat layers twice. Top with remaining noodles, meat sauce, mozzarella and Parmesan; cover with foil.
BAKE 50 min. or until heated through, uncovering after 40 min. Let stand 10 min. before cutting to serve.