3 cooker easy roast with gravy Recipes

beef roast or 3 -4 lbs cross-rib roasts or 3 -4 lbs rump roast, about, vegetable oil, onions, thinly sliced, stalks celery, thinly sliced, carrots, peeled and cut into 1/2 inch cubes, garlic cloves, minced, dry mustard, dried thyme leaves, salt, cracked black peppercorns, flour, condensed tomato soup, condensed beef broth (undiluted ), worcestershire sauce, brown sugar (optional), balsamic vinegar (optional) or 2 tbsp red wine vinegar (optional)

chuck roast, 2-3 inches thick, vegetable oil, onion soup mix (or onion mushroom soup mix), cream of mushroom soup, water (or beef or chicken stock)