ground beef (I used about 1 pound)onion (I used about 1/4 cup chopped)taco seasoning packet (I ended up using a combination of garlic powder, chili powder, cumin & ground pepper)canned tomatoes (I had a 14.5 ounce can of crushed tomatoes, I used about 2/3 of the can)shredded cheese (I took a block of cheddar & a block of pepper jack and grated what I needed onto to the nachos)tortilla chips (I used enough to cover a 13×9 baking sheet)sour cream (a dollop for each serving)Preheat oven to 350 degrees F.Saute the onion in olive oil or butter until tender. Add ground beef.When the beef is browned add your taco seasoning packet (or spices) and your tomatoes. Simmer until it’s all mixed together.Spray baking sheet with cooking spray and put a good layer of tortilla chips on it.Spread the beef mixture over the chips and then top with cheese. Place in oven until the cheese is completely melted.Serve topped with a dollop of sour cream (and any of your other favorite nacho toppings: black olives, jalepenos, peppers, etc)This was simple and delicious! I really liked how the tomatoes in the ground beef gave them a saucy texture and full flavor. I also liked how using the oven kept the chips crispy. I usually do nachos in the microwave and end up with either tough or limp chips. Not anymore! Put them in the oven!