Boil your pasta in well salted boiling water, see notes below for the perfect ratio of salt to water! Reserve a cup of water before draining.
Heat the olive oil in a large fry pan over medium - high heat. Pat the shrimp dry and season lightly with salt and pepper right before frying.
Sear for 1 minute each side until just cooked through. Set aside.
Reduce the heat to medium and in the same pan add ½ tablespoon olive oil and then the garlic. Cook for 30 seconds - 1 minute.
Stir in the tomato paste as best you can and let it cook for a minute.
Pour in the wine, scrap the brown bits up from the bottom of the pan and then add the cherry tomatoes. Let it gently bubble for 2 minutes.
When adding the butter next, the wine should be at the most gentle simmer so turn heat down if you need.
Add the butter one piece at a time, whisking it in gently and letting it completely melt before adding the next. It will thicken and a glossy emulsified sauce will emerge.
Add ¼ cup pasta water and 1 tablespoon of lemon juice and mix in well. Let it simmer for 1 minute.
Add the cooked pasta and toss well, let it gently bubble away for 1 - 2 minutes to thicken up slightly. Check for seasoning.
Toss the finely chopped flat leaf parsley, followed by the prawns to warm through.
Serve with lemon zest on top and a drizzle of olive oil if you wish.
See the video below!