On waxed paper, sprinkle beef with 2 tbs flour, salt, and pepper; toss to coat. Heat oil in large skillet over medium-high heat until hot. Add coated beef; cook and stir 4 to 5 minutes or until browned, stirring occasionally.

In 4 to 6 quart slow cooker, layer potatoes, onion and carrots. Add browned beef; sprinkl with any remaining flour mixture. Top with gravy and tomatoes.

Cook; cook on low settting for 8 to 10 hours. Before serving, blend 3 tbs flour with 1/4 cup cold water, Stir into stew. Cook on HIGH, covered, 10 minutes or until thickened. 6 ( 1 2/3 cup ) servings