Combine olive oil, fresh basil, garlic, freshly cracked black pepper, grated parmesan and toasted pine nuts in a food processor and run until coarsely ground but combined well. Season mildly with salt, preferably sea salt. Keep aside.
Cook Conchiglie in 3 litres of salted boiling water,stirring occasionally for 5–7minutes and drain well.
Serve hot conchiglie tossed in prepared Genovese pesto sauce.Garnish with stuffed olives, toasted pine nuts and grounded parmesan and pepper mill on the side.