Beef Kebabs with Monkey Gland Sauce

Name: Beef Kebabs with Monkey Gland Sauce
Prep time: 25 min
Cook time: 2 h
Total time: 2 h
Yield: 4 portions
Ingredients: 30 g vegetable oil; 150 g onions; 2 garlic cloves; 250 g mango chutney; 250 g tinned chopped tomatoes; 20 g cider vinegar; 40 g Worcestershire sauce; 15 g brown sugar; 1 tsp chilli sauce; 1 tsp fine sea salt; 1000 g rump steak