Easy Japanese Curry

Bahan-bahan (1 porsi)

• ½ onion ((5 oz, 140 g; peeled))
• ½ carrot ((3.2 oz, 90 g; roughly 3 inches) )
• ½ russet potato ((¼ lb, 130 g))
• 5 oz boneless, skinless chicken thigh
• ⅛ tsp freshly ground black pepper
• ⅛ tsp Diamond Crystal kosher salt
• 1 Tbsp neutral oil
• 2 cups water
• 2 cubes Japanese curry roux ((about 2 oz, 55 g))
• 1 serving cooked Japanese short-grain rice
• fukujinzuke (Japanese red pickled vegetables) ((optional))