Taco Spaghetti 1 pound hamburger 1 packet taco seasoning mix 1 (8 ounce) jar taco sauce 1 can mushrooms (optional) 2 cups spaghetti sauce 1 pound dry spaghetti Cheese, shredded Sour cream Tortilla chips, crumbled Brown hamburger; drain. Mix with taco seasoning mix, taco sauce, mushrooms and spaghetti sauce. Meanwhile, cook spaghetti, then mix into the hamburger mixture. Put into a casserole dish. Sprinkle shredded cheese on top. Cover and bake at 400 degrees F until the cheese is melted. Spread as much sour cream on top as you desire. Sprinkle cheese and crumbled tortilla chips on top. NOTE: This is great served hot or as a leftover.