Mom's Sloppy Joes

This recipe comes from my mom. Always a favorite of our family. When Ryan and were first dating, my family went to Horse Valley for July 4th. My mom made these and Ry ate like 8 of them. Quite a compliment to the chef.

2 lbs. ground beef
1 lg. onion, chopped
1/4 c. flour
1 (6oz.) can tomato sauce
3 T. mustard {I use Southwest Spicy sweet and hot mustard}
1/2 c. ketchup
4 T. brown sugar
2 T. vinegar
1 T. worchestershire sauce
Cook meat until brown. Add onion, Cook until clear. Sprinkle flour over meat. Add remaining ingredients and simmer for 1 hour. You can also add 1 can of chili or 1 can of black beans, drained and rinsed.