Step 1
Preheat oven to 350 degrees. Spray 13x9x2 baking dish with nonstick cooking spray.
Step 2
In a large skillet, crumble and brown ground beef or turkey until no longer pink; adding the onion during the last few minutes. Drain excess grease.
Step 3
Add the taco seasoning mix and tomato sauce. Set aside.
Step 4
Combine the sour cream and cottage cheese. Set aside.
Step 5
Spread half of the crushed chips in the bottom of baking dish. Top with half of the meat mixture, half the cottage cheese mixture and half the cheese.
Step 6
Repeat with crushed chips, meat and cottage cheese mixture. Reserve remaining shredded cheese.
Step 7
Bake uncovered for 25 minutes. Top with remaining shredded cheese and bake 5 to 10 minutes longer.
Step 8
Serve taco casserole with toppings of your choice.
