Corned beef with mustard sauce

Name: Corned beef with mustard sauce
Prep time: 15 min
Cook time: 1 h 30 min
Total time: 1 h 30 min
Yield: 6 portions
Ingredients: oil; 1500 g water; 4 whole cloves; 50 g malt vinegar; 900 - 1200 g corned beef silverside; 400 - 500 g Kent pumpkin; 150 g frozen green peas; 150 g frozen corn kernels; 300 - 400 g sauerkraut; 30 g unsalted butter; 30 g plain flour; 300 g milk; ½ - 1 tsp salt; 1 tsp wholegrain mustard; 1 ½ tsp mustard powder