3/4 lb       lean ground beef
1              medium onion chopped
1 can        condensed cream of celery soup
1/4 cup     water
1 tblsp      ketchup
1/8 tsp      pepper
6               hamburger buns split and toasted

In a lightly oiled skillet over med-high heat cook ground beef until beef is browned
Add chopped onion and cook for about 1 1/2 minutes longer stirring occasionally
Add soup, water, ketchup, and pepper, mix well and simmer until well heated
Spoon onto toasted buns and serve