Whip the heavy cream to soft peaks. Cover and store in the frideg until ready to use.
Add the granulated sugar and lemon zest to a large bowl. Using your fingertips, massage together the sugar and lemon zest.
Add the whole eggs, egg yolks and lemon juice and whisk well to combine the ingreadients.
Place the bowl over water that is at a low simmer, Warm the mixture until the sugar is dissolved and mixture warms to 165°-170℉
Place the mixture into the bowl of a stand mixer.
Using the whisk attachment, beat on high until the mixture is tripled in volume and lightened in color.
Gently fold it into the egg/sugar mixture in 2 stages.
Place the mixture into the prepared loaf pan and cover with the over hanging plastic. Cover with foil and place in the freezer.
Chill overnight.
When ready to serve, remove the plastic covering. Cover with a serving plate and turm over. Remove the plastic wrap from the semifreddo.
Cut thick slices and serve with the raspberry sauce and crumbled lady fingers.