Tomato-Braised Swiss Chuck Steak (Slow Cooker Method)

Ingredients

• 1/3 cup unbleached all-purpose flour
• 1 tablespoon dry mustard
• 1/2 teaspoon salt (I use Kosher)
• 1/4 teaspoon freshly ground pepper
• 2 pounds chuck steak, trimmed of excess fat ((or roast, if you prefer))
• 2 tablespoons vegetable oil (+ more if needed)
• 1/2 medium onion, finely chopped
• 1 medium carrot, finely chopped
• 1 tablespoon brown sugar
• 1 tablespoon Worcestershire sauce
• 14 oz. can diced or crushed tomatoes
• 2 1/4 cups pan drippings + water
• 1/4 cup cold water
• 2 tablespoons cornstarch
• 1/2 teaspoon salt