Start by making the cheese straws. Unroll the puff pastry and brush lightly with beaten egg. Cover with the grated cheese and fold the pastry in half like a sandwich. Press tightly, brush the top lightly with egg and cover with sesame seeds. Press down firmly using a rolling pin. Cut into thin strips and roll up tightly. Place onto a lined baking tray and bake in the oven at 200`c for 20-25 minutes. Meanwhile, make the whipped ricotta by blitzing all the ingredients together till smooth and creamy. Serve the dip on a large plate or bowl with the Parmesan straws on the side.