Brown meat seasoned with garlic. Drain. Add onion flakes and tomato sauce; simmer 20 minutes. Mix together olives, sour cream,cottage cheese and jalapenos. In 2 quart casserole (greased) layer Doritos, meat mixture, then cottage cheese mixture, making 2 layers each, ending with cheese. Save Monterey cheese for top layer and add the last 5 minutes of baking. Bake 30 minutes at 350 degrees.