COUNTRY INN SWISS STEAK

1 1/2 lbs. thick-cut round steak 
1/2 c. flour
1 Tbsp. dry mustard
1 1/2 lbs. thick-cut round steak 
2 Tbsp. oil
14 1/2 oz. can diced tomatoes
1 c. sliced onion
1/2 c. diced celery
3 carrots, diced
2 Tbsp. Worcestershire sauce
1 Tbsp. brown sugar, firmly packed
salt and pepper to taste

Preheat oven to 350 degrees.

Stir together mustard and flour in a small bowl or cup. Sprinkle flour mixture over steak and pound it in with a meat mallet. Cut pounded steak into serving-size pieces. Preheat oven to 350 degrees. Heat oil in a large, nonstick skillet over medium-high heat. Add meat and cook, turning once, until browned on both sides. Transfer to a baking pan. In a medium bowl, stir together tomatoes, celery, carrots, Worcestershire, sugar, salt, and pepper. Pour over beef. Cover and bake until meat is tender when pierced, about 1-1/2 hours. Serve immediately.