Sweet Onion Takikomi Gohan

2 rice cooker cups uncooked Japanese short grain rice ((2 rice cooker cups = 12 oz or 1½ cups or 360 ml))

½ sweet onion

2 tsp neutral flavor oil (vegetable, canola, etc)

Mitsuba (Japanese parsley) ((or green onion to garnish))

2 Tbsp mirin ((or 2 Tbsp sake/water + 2 tsp sugar))

1 Tbsp soy sauce