Trim fat from meat. Spray an unheated large skillet with nonstick cooking spray. Add meat and brown on all sides.
Place unpeeled potatoes, mushrooms, frozen carrots, and tarragon or basil in a 3-1/2- to 4-quart electric crockery cooker. Place browned meat on top of vegetables. Sprinkle with salt. Pour condensed soup over meat. Cover and cook on low-heat setting for 10 to 12 hours.
To serve, transfer meat and vegetables to a serving platter. Serve the sauce over meat and vegetables. Makes 5 servings.