Add ground beef, 1 cup ketchup, chili seasoning, and Worcestershire sauce in a medium saucepan. Bring to a simmer over medium-low heat. Simmer 2 hours.
Cook spaghetti near the end of simmering time.
Warm extra ketchup in a microwave or a small saucepan. Additional Worcestershire sauce can be added to the ketchup if desired.
Place spaghetti into a bowl, top with ketchup and beef mixture. Sprinkle any additional toppings you want.
Serve with saltine crackers and grated Parmesan cheese.
Additional Worcestershire sauce can be added to the topping ketchup for additional spiciness. Use about 2 teaspoons Worcestershire sauce for every 1/2 cup ketchup, thanks to reader Jim for the ratio advice!).Nutritional data provided does not include addition toppings or crackers. Data provided uses 80/20 ground beef.