Corned Silverside with Mustard Parsley Sauce

Ingredients

• 1.5 kg silverside/corned beef
• ¼ cup white or cider vinegar
• 2 tbsp brown sugar
• Few while cloves
• Enough mustard seeds to cover top side of meat
• 1 large brown onion, quartered
• Vegetables of choice [prepare separately as appropriate for serving with beef] 

     Mustard parsley sauce

• 2 heaped tbsp butter
• 2 heaped tbsp cornflour
• 2 cups milk
• 2  heaped tsp wholegrain mustard
• 4 tbsp roughly chopped fresh parsley

Method

1. Place beef in a slow cooker. Cover with cold water. Add vinegar, sugar, onion, cloves and sprinkle meat with mustard seed. Cover with water.
2. Cook on high for 2+ hours.
3. Just before serving, make mustard parsley sauce: Melt butter in a saucepan over medium heat. Add flour. Cook, stirring for 1 minute or until bubbling. Remove from heat. Gradually stir in milk until combined. Return to heat. Cook, stirring for 3 to 4 minutes or until mixture boils and thickens. Remove from heat. Stir in mustard and parsley.
4. Remove beef from pan. Slice. Serve with sauce and vegetables of choice.