SEASON both sides of roast with salt and pepper. Brown meat in large heavy pot or Dutch oven on high heat in 1/4 cup of the dressing, turning to brown all sides. Add onions; stir to brown.
ADD remaining 1/4 cup dressing, potatoes, carrots and broth. Bring to boil; cover. Reduce heat to low. Simmer 1-1/2 to 2 hours or until meat and vegetables are tender.
REMOVE meat from pan; slice meat thinly against the grain. Serve meat and vegetables topped with pan gravy. Sprinkle with chopped parsley just before serving.