Remove the intestines from the raw prawns by cutting along the back shell and extracting the dark vein. Peel the 2 cloves garlic and mince finely.
Heat some olive oil in a large pan over medium-high heat. Add the prawns and garlic, cooking for 2-3 minutes on each side until the prawns turn opaque and pink. Transfer the prawns to a plate.
In the same pan with the remaining olive oil, stir in the 1 tablespoon tomato paste and cook for 1 minute. Add the 100 ml broth and bring to a boil while stirring for 1-2 minutes.
Remove from heat and pour in the 200 ml cream. Season with salt, pepper, and 1 pinch sugar. Stir in the 1 teaspoon Pernod. Return the prawns to the pan to coat with sauce.