Coney sauce recipe from Rachel Ray
1 pound ground beef
2 onions, finely chopped
2 cloves garlic, finely chopped
2 tablespoons chili powder
1 tablespoon ground cumin
1 6 ounce can tomato paste
1 tablespoon yellow mustard, plus more for topping
1 tablespoon Worcestershire sauce
2 teaspoons brown sugar