All ingredients should be combined well in a sauce pan before being cooked for 5 minutes at a low heat.
Remove from the heat and then reserve.
Heat the oil in a sauce pan, then sauté the garlic until fragrant.
Pepper and tamari should both be freshly ground.
Cornstarch and water should be combined, then gently added to a sauce pan and cooked over low heat until the sauce thickens.
Remove from the heat and then reserve.
Once the cast iron pan is heated, add the oil, onion, and garlic. After adding the beef and cooking it for three minutes with a strong scent, turn off the heat.
Place freshly cooked rice in the centre of a platter, then add cooked corn kernels and butter on top.
Serve steak surrounded by rice, with Amakuchi and Karakuchi sauces drizzled on top.