1-Preheat oven to 350 degrees F (175 degrees C).
2-Cook pasta in a large pot of boiling water until al dente. Drain.
3-In a large skillet, cook and stir ground beef and chopped onion over medium heat until brown. Mix in tomato soup, diced tomatoes, and taco seasoning mix. Stir in pasta.
4-Spoon beef mixture into a 9×13 inch baking dish. Sprinkle crumbled taco chips and grated cheese on top.
5-Bake for 30 to 35 minutes, until the cheese is melted. Serve with chopped green onions and sour cream, if desired.
Source:allrecipes.com/Debi Van Name