Take a large skillet, and place this over a medium high heat. Crumble your ground beef into the said skillet. Add your onion and celery. Stir and cook this beef mixture until the beef is completely browned. This will take about 7-10 minutes.

Stir your ketchup, Worcestershire sauce, brown sugar, mustard, vinegar, and lemon juice into the beef mixture you have prepared from earlier. Reduce your heat down to a medium low heat, and cook this mixture at a simmer until it has thickened, which will take about 20 minutes.