Place the Clams in a bowl of cold salted water and leave for 1 hour to remove any sand. Drain and rinse thoroughly.
Heat 2 tbsp vegetable oil in a pan over medium-high heat. Add the Clams and Dry white wine, cover and cook for 3–4 minutes until the clams open. Discard any that remain closed.
Remove the Clams from the pan. Remove three-quarters from their shells and reserve. Leave the remainder in their shells for serving.
Strain the cooking liquid through a fine sieve and reserve.
Heat the remaining 2 tbsp Extra virgin olive oil in a pan over medium heat.
Add the Garlic and cook for 30 seconds until fragrant.
Add the Fresh Parsley and cook for 1 minute.
Add the Fregola and toast for 1–2 minutes, stirring regularly.
Add the Passata and reserved clam cooking liquid.
Gradually add the Fish stock, stirring occasionally, until the Fregola is tender but retains a slight bite, approximately 12–15 minutes.
Stir through the Capers, Olives and shelled Clams.
Cook for 1–2 minutes to warm through.
Season with Sea salt and Cracked black pepper to taste.
Serve immediately, topped with the reserved Clams in their shells.