Brown ground beef and drain well. Chop 1 large onion and combine with drained ground beef. Continue to brown until onion is translucent. Remove from heat. Stir in beans, oregano, cumin, and garlic powder.
Place 4 noodles in bottom of 9" x 13" pan (coated with non-stick spray). Spread 1/3 meat mixture over noodles,
Cover pan with foil and bake at 350 degrees for 1 hour. Remove from oven and spread the following topping on top of lasagna. Return the pan to the oven without covering for 15 minutes or until cheese is melted.
2 cups sour cream
Mix sour cream, onions, and olives.
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