German sourloaf

Ingredients

• 500 ml red wine
• 300 ml vinegar
• 500 ml water
• 1 tsp pepper seeds
• 1/2 tsp mustard seeds
• 1 tsp salt
• 1 tsp sugar
• 1 carrot
• 1 sellery
• 2 onions
• 1/2 kg beef loaf
• 3 tsp flour
• 2 tsp oil