Sam Arnold's Cross Rib Roast

• 3 cross-rib roast
• 2 tomatoes
• 2 spice mixture
• 1 bouquet garni beef stock
• 65 gr black olives pitted
• 65 gr carrots coarsely (chopped)
• 60 gr onions coarsely (chopped)
• 50 gr celery coarsely (chopped)
• 45 gr mushrooms coarsely (chopped)
• 28 gr butter