Coney Dog Sauce

2 C. finely chopped onion
1/3 C. cider vinegar
1 C. sugar
3 lbs. ground beef
2 T. salt
4 T. celery seed
1 #10 can tomato puree
2 T. chili powder
1 T. pepper

Brown hamburger and onions in a very large skillet, drain. Add the rest of the ingredients and simmer for 3 1/2 hours. Stir frequently as it will tend to stick. This freezes very well.

Picnic Basket From Kim of Kim's Whim