Bring a saucepan of salted water to the boil and cook your rice for 10-12 minutes, or until just tender. Drain it well in a colander and let it sit uncovered for a few minutes so the steam escapes. I've learned that slightly dried-out rice fries up far better than rice that's still steaming hot and wet.
Heat your oil in a large wok or frying pan over medium-high heat. Add the sliced garlic and the white parts of your spring onions, stirring often so nothing burns. Cook for about 2 minutes until the garlic turns lightly golden and the kitchen starts smelling incredible.
Toss in your cooked prawns, chilli flakes and coriander, stirring everything together for another 2 minutes. Since the prawns are already cooked, you're just warming them through and letting them soak up all that garlicky flavour from the pan.
Push the prawn mixture to one side of the pan and pour your beaten eggs into the empty space. Let them sit for a few seconds, then stir gently to break them into soft curds, the same way you'd make scrambled eggs. This usually takes me under a minute.
Add your drained rice to the pan along with the soy sauce if using, and toss everything together quickly over high heat for 2-3 minutes. You want every grain coated and heated through, with the egg and prawns evenly distributed.
Scatter over the green parts of your spring onions and a sprinkle of sesame seeds, then serve immediately while it's hot. I always taste and add an extra splash of soy sauce at this point if I need it.