Steak and kidney pudding

Suet pastry

• 200 g plain flour
• 100 g suet mix (see Tips)
• 5 sprigs fresh thyme, leaves only
• 1 tsp mustard powder
• ¼ tsp salt
• ¼ tsp ground black pepper
• 120 g cold water

Steak and kidney filling

• 20 g oil
• 1 brown onion, cut into halves
• 600 g gravy beef, cut into pieces (3 cm)
• 200 g lamb kidneys, cut into quarters and white cores removed
• 2 carrots, peeled and cut into pieces (2-3 cm)
• 1 tbsp plain flour
• 1 tbsp tomato paste
• 2 tbsp Worcestershire sauce
• 1 tbsp Vegetable stock paste (see Tips)
• 100 g water
• ½ tsp salt
• ½ tsp ground black pepper
• 200 g fresh mushrooms, cut into slices

Assembly

• butter, for greasing
• 2200 g water