1 large onion, sliced
1 large flank steak (about 3 pounds)
2 teaspoons Montreal steak seasoning, McCormick Grill Mates
1 packet (1.0-ounce) onion soup mix, Lipton
1 can (14.5-ounce) stewed Italian tomatoes, S&W
3 stalks celery, cut into 1-inch pieces
1 can (10.75-ounce) condensed cream of celery soup, Campbells

1 large onion, sliced 1 large flank steak (about 3 pounds) 2 teaspoons Montreal steak seasoning, McCormick Grill Mates 1 packet (1.0-ounce) onion soup mix, Lipton 1 can (14.5-ounce) stewed Italian tomatoes, S&W 3 stalks celery, cut into 1-inch pieces 1 can (10.75-ounce) condensed cream of celery soup, Campbells

Place onion in the bottom of a 5-quart slow cooker. Coat flank steak with Montreal seasoning; place on top of onion. Sprinkle soup mix over roast and add undrained tomatoes. Cover and cook on low heat setting for 8 hours (overnight).

In the morning, stir together the celery and celery soup. Spoon into slow cooker. Cover and continue cooking for 8 hours more. Serve roast hot with gravy.