Step 1

Preheat oven to 325 degrees.

Step 2

Whisk together the vinegar, Worcestershire sauce, water, ketchup, salt, paprika, chili powder, and sugar. Set aside.

Step 3

Place the beef, in an even layer, into a Dutch oven or roasting pan with a good fitting lid.

Step 4

Sprinkle the chopped onion over the top of the beef.

Step 5

Pour over the sauce mixture.

Step 6

Place a lid on the pan and bake for 2 and a half hours, stirring at the one hour and two hour mark.

Step 7

Remove the lid and bake for 30 minutes more.

Step 8

Serve immediately.