Preheat oven to 350 degrees. Sprinkle meat with salt and pepper. In a roasting pan or Dutch oven, brown roast in oil on all sides over medium heat. Drain fat and discard.

Add beef broth, onion, and celery to pan. Bake covered for two hours. Remove celery and discard.

Add desired vegetables around roast. Roast, uncovered, for 50 to 60 minutes more, until meat and vegetables are tender, basting twice. Remove meat and vegetables to platter.

Measure remaining pan juices; add water to equal one and a half cups.

In a saucepan, whisk together the cold water and flour until well combined. Add the pan juices. Cook and stir until thickened and bubbly; then cook and stir for one minute more. Season with salt and pepper.