Pot Roast with Mushroom Gravy

Ingredients

• 1 pound small red potatoes, halved
• 2 cups fresh baby carrots
• 1/2 pound sliced fresh mushrooms
• 1 medium onion, cut into six wedges
• 2 celery ribs, cut into 1-inch pieces
• 1 boneless beef chuck roast (3 pounds)
• 1 can (14-1/2 ounces) reduced-sodium beef broth
• 1 can (10-1/2 ounces) mushroom gravy
• 1 package (1-1/2 ounces) beef stew seasoning mix