Chaliapin Steak Don (Food Wars! Shokugeki No Soma Recreation Recipe)

Ingredients

• 2 Thick sirlion steaks or fillet
• 3 White onions
• Pinch of salt and pepper
• 1 tbsp Unsalted butter
• 1 tbsp beef fat (beef dripping) or olive oil
• 300g Cooked Japanese short grain white rice
• 3 Umeboshi pickled plums (optional)
• 4 Shiso leaves or Ooba leaves (optional)
• 2 tbsp Spring onion chopped - to garnish
• 1 tbsp Unsalted butter
• 75ml (5 tbsp) Red wine
• 1 tbsp Soy sauce
• 1 tbsp Water + 1 tsp Corn starch (or potato starch)