Cook the brown rice according to the packet instructions. Drain well and set aside to cool slightly.
Prepare the edamame according to the packet instructions. Remove the beans from their pods and set aside.
Heat the olive oil in a large wok or frying pan over high heat. Add the ginger, garlic and chillies and stir-fry briefly until fragrant.
Add the peeled prawns and stir-fry for a few minutes, until they turn pink and are cooked through. Transfer them to a plate and set aside.
Add the mixed vegetables and sweetcorn to the same wok. Stir-fry for a few minutes, stirring frequently, until the vegetables have softened slightly but still retain some crunch.
Push the vegetables to the sides of the wok and add the eggs to the centre. Scramble them until cooked, breaking them into small pieces.
Add the brown rice, edamame and prawns. Pour in the soy sauce, sweet chilli sauce and sesame oil. Toss everything together and cook for a few minutes, until all the ingredients are heated through and the flavours are well combined.
Taste and season with salt and pepper, if needed.
If using the large shell-on prawns for garnish, cook them separately in a frying pan with a little olive oil until they turn pink and are cooked through.
Serve the fried rice immediately, garnished with the large prawns, if using.