Combine beef, beans, oregano, cumin and garlic powder. Place four of the uncooked lasagna noodles in a 13x9-in. baking dish. Spread half the beef mixture over the noodles. Top with four more noodles and the remaining beef mixture. Cover and remaining noodles. Combine water and picante sauce. Pour over all.
Cover tightly with foil; bake at 350° for 1-1/2 hours or until noodles are tender. Combine sour cream, onions and olives. Spoon over casserole; top with cheese. Bake, uncovered, until cheese is melted, about 5 minutes.