Warmth the oil in a big deep frying pan or a big saucepan over a medium-high warmth and fry the onion and mince collectively till evenly browned, stirring frequently to interrupt up the mince because it cooks.
Sprinkle over the Cajun seasoning and stir via the mince and onions. Crumble over the inventory dice and add 200ml/7fl oz water. Deliver to a delicate simmer, cowl the pan with a lid and cook dinner quarter-hour, stirring often and including slightly additional water if wanted.
Whereas the mince is simmering, cook dinner the rice in a big saucepan of boiling water for 10–12 minutes, or in line with the pack directions, till tender.
Add the frozen greens to the mince combination and stir via. Cook dinner for an extra 5 minutes, or till scorching all through, stirring often.
Drain the cooked rice and return to the pan. Add the mince, greens and spring onions and toss collectively effectively. Season to style with salt and pepper and serve.