Beef Bowl (Gyudon)

Ingredients (8 items)

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• 4 cups cooked rice
• 6 tablespoons mirin (Japanese sweet wine)
• 3 tablespoons soy sauce
• 2 tablespoons sake
• 1 onion, cut into wedges
• 10 ounces beef, thinly sliced
• 4 eggs
• 1 teaspoon pickled ginger (beni shoga), or to taste