Step 1

Combine ketchup, salt, mustard, horseradish, Worcestershire sauce, and ground black pepper in a 1-cup measuring cup. Add more ketchup if combined ingredients don't equal 1 cup. Stir until well mixed. Place ground beef in a stock pot; pour ketchup mixture over the ground beef.

Step 2

Fill the same measuring cup with warm water. Stir to loosen any fine seasoning remaining; pour into stock pot. Stir onion into ground beef mixture; add monosodium glutamate. Mix until ingredients are well combined.

Step 3

Cook and stir the ground beef mixture over low heat until the ground beef is finely crumbled, about 15 minutes. Bring to a boil; cook until flavors blend, about 25 minutes.