Start by adding the onion and half of the oil into a large non-stick saucepan. Season with salt and saute until translucent, adding the garlic half way, for around 6 minutes.
Next, add the orzo, frozen sweetcorn and stock into the pan. Bring up to a low simmer (this may take a bit of time due to the frozen corn) and set a timer for 12 minutes. Stir occasionally.
Meanwhile, pat the defrosted prawns dry with a paper towel and add to a bowl. Coat with the paprika, remaining oil and a pinch of salt. In a separate non-stick frying pan, increase the heat to high and fry the prawns on each side for 2 minutes.
When the orzo is cooked and the stock has absorbed and formed a sauce, turn off the heat and add the creme fraiche, lime juice and coriander. Stir and season with salt and pepper.
Serve the creamy sweetcorn orzo with a portion of prawns and an extra sprinkle of coriander. Add an extra squeeze of lime to taste.