Peel and cut the Jerusalem artichokes into pieces and soak in salted water.
Blanch the puntarelle, cut into pieces and sauté in a pan with the diced Jerusalem artichoke and a drizzle of olive oil. When cooked, season to taste with salt and pepper.
In a bowl, mix the ricotta, grated Grana Padano Riserva and egg.
Add the vegetables, the pitted taggiasca olives and mix well, seasoning with salt and pepper if required.
Line a round baking tray with the shortcrust pastry and fill with the ricotta and vegetable mixture.
Bake in a preheated oven at 180°C for 25-30 minutes.