Beef In Walnut Sauce

• 8 allspice
• 4 garlic buds (minced)
• 1 cinnamon stick (whole)
• 950 gr rump roast cubed
• 230 ml tomato sauce
• 120 gr walnuts (ground)
• 120 ml water
• 80 ml cider vinegar
• 16 ml lemon juice
• 1 slice sourdough french bread (sliced toasted)