Barbecued Hot Dogs

3/4 cup chopped onion

3 Tablespoons butter

1-1/2 cups chopped celery

1-1/2 cups ketchup

3/4 cup water

1/3 cup lemon juice

3 Tablespoons brown sugar

3 Tablespoons white vinegar

1 Tablespoon Worcestershire sauce

1 Tablespoon yellow mustard

2 packages (1 pound each) hot dogs

20 hot dog buns, split

In a saucepan over medium heat, saute onion in butter until tender. Add celery, ketchup, water, lemon juice, sugar, vinegar, Worcestershire sauce and mustard; bring to a boil. Reduce heat; cover and simmer for 30 minutes. Cut three 1/4 inch deep slit on each side of the hot dogs; place in a 2-1/2 quart baking dish. Pour the sauce over the hot dogs. Cover and bake at 350 degrees for 40-45 minutes or until heated through. Serve on buns.