Take your steak out of the fridge and place in a bowl.
In a separate bowl, mix together all of the marinade ingredients. Pour half over the steak and reserve the rest to use as the salad dressing. Cover the steak and leave to marinade at room temperature for 1 hour (you can marinade for longer – up to overnight, but if you do, you’ll need to refrigerate it, then take the steak out of the fridge an hour before cooking it to allow it to come up to room temperature).
Heat up a griddle or frying pan on a high heat. Once very hot, place the steak in the pan and cook for 2-3 minutes on each side, so the steak is seared but still very pink in the middle. Remove from the pan and place on a board to rest for a few minutes.
Meanwhile, sprinkle the pineapple slices with the brown sugar on both sides and place on the hot griddle. Cook, turning once until browned and lightly caramelized on both sides (takes about 3-4 minutes altogether). Remove from the heat.
Divide the rice and salad leaves between two bowls. Nestle the caramelized pineapple pieces in the bowls and top with avocado slices, radish slices and cucumber strips that have been folded prettily to fit in the bowl. Spoon on the edamame beans.
Go back to your steak and slice into half-inch cubes. Place the steak on top of the two salad bowls.
Sprinkle over the spring onions, sesame seeds and a pinch of shichimi. Arrange the thai chillies on top if using, before serving the poke bowls with the reserved salad dressing.
Nutritional info is per serving - and this recipe serves 2. If you want to lower the calories on this one, you can reduce the the steak and avocado (they're the highest calorie ingredients) or split the recipe between three, instead of two people.