Cook pasta in your boiling salted watered until just cooked before setting aside until needed.
Add your butter to the pan over a medium heat, season with Salt and lightly saute your prawns on both sides for about 2-3mins and remove from the pan and set aside. You don’t want the prawns cooked through as they will go back in later to finish off.
Add your shallots to the pan with a dob of butter
Slice the garlic and add to shallots
Add tomatoes to the pan and sweat them down adding a little water at this stage. You may not need all the water depends on how juicy your tomatoes are. This will help to create your sauce.
Add Fresh Parsley to pan.
Add pasta to the sauce and then some grated Parmesan. And season
Place Spaghetti on a serving plate and top with the prawns.