Step 1

Preheat oven to 250 degrees.

Step 2

Salt and pepper all sides of the London broil.

Step 3

Combine red wine vinegar, ketchup, brown sugar, garlic, Worcestershire, and beef broth in a small bowl and set aside.

Step 4

Heat a dutch oven over high heat and add butter and olive oil. Once the dutch oven is extremely hot, carefully add the London broil and sear on all sides. (about 15 seconds on each side).

Step 5

Remove dutch oven from heat. Add onions and pour sauce over the London broil. Cover and place in the oven for 2.5 hours.

Step 6

Remove from oven and check on the meat, it should be very tender and easy pull apart with fork. If not, cover and cook for an additional 30 minutes or so.

Step 7

When ready, serve with mashed potatoes, steamed rice or veggies.