1 cup yellow onion, diced
1/2 tsp salt
1/2 tsp pepper
1 cup tomatoes, diced
1/4 cup mayo
3 tbsp Thousand Islands dressing
4 large sesame seed hamburger buns
1 cup rippled potato chips, broken up
4 slices Swiss cheese
Preheat oven to 400F. In a large frying pan over medium-high heat, brown the ground beef with a dab of margarine or butter. Add the onions, salt and pepper to the beef while it's cooking. Once the meat is completely browned remove the pan from the heat and drain the grease. Add the tomatoes, mayo and Thousand Islands dressing to the meat and stir well. Place the bottoms of the hamburger buns in a baking dish and then spoon the meat mixture over them. Sprinkle the broken up potato chips over the meat. Place a slice of Swiss cheese on each sandwich and then place the top bun on the sandwich. Place the pan in the oven and bake the sandwiches until the cheese as melted and the buns are toasted. 8-10 minutes. Serve and enjoy!