Chaliapin Steak Don | Onion Steak Food Wars Recipe | Buca Di Breton | Umami

Ingredients

• 250 g sirloin
• ½ onion (grated)
• salt (to season)
• pepper (to season)
• 2 tbsp butter
• 1 tbsp olive oil
• 1 tbsp pickled plum paste (umeboshi)
• 200 g rice (short-grain Japanese, cooked)
• 2 spring onions (green part, thinly sliced for garnish)
• ½ onion (diced)
• 2 spring onions (white part, chopped)
• 1 tbsp soy sauce
• 4 tbsp red wine
• 1 tbsp water
• potato starch (or corn starch)