Pour the olive oil into a large, deep frying pan and set over a low-medium heat until 100°C or just shimmering, then add the chilli flakes, the crushed garlic cloves, the large chopped tomatoes, red pepper slices, chopped onion and a squeeze of lemon juice. Fry for 8-10 minutes until the peppers soften and all is sizzling and fragrant.
Turn up the heat slightly, and then add the prawns. Fry for 1 minute until prawns are heated through. Serve with crusty bread.
* These prawns are already cooked, they do not need long in the pan! *