In a skillet add the hamburger and onion, cook until the hamburger is longer pink and the onions are soft.
While the hamburger is browning cook your pasta according to the directions on the box. Once the pasta is done drain the water.
Once the hamburger is browned add the ketchup, mustard, Worcestershire sauce, and pickle juice and stir in.
Add the pasta and cheddar cheese, stir until the cheese is melted. Fold in the fresh tomatoes and simmer for about 5 minutes. Serve