Omurice (Omelette Rice)

Bahan-bahan (2 porsi)

• ¼ onion ((2.1 oz, 60 g))
• 4 mushrooms ((1.8 oz, 50 g))
• 4 slices ham ((2.8 oz, 80 g; or 2 thick slices))
• 1 Tbsp neutral oil
• 3 Tbsp green peas ((defrosted and drained, if frozen))
• ⅛ tsp Diamond Crystal kosher salt
• ⅛ tsp freshly ground black pepper
• 2 cups cooked Japanese short-grain rice ((cooled or day old; frozen cooked rice works well))
• 2 Tbsp unsalted butter ((divided))
• 3 Tbsp ketchup
• 3 Tbsp tomato paste
• 2 Tbsp water
• 4 large eggs (50 g w/o shell) ((divided))
• 2 Tbsp milk ((divided))