For the best lemon flavor, use fresh lemon juice and fresh peel.
An 8-ounce container frozen whipped topping, thawed, can be sued in place of the whipped-cream topping.
When grating lemon, keep rotating the lemon to grate only the flavorful, bright-yellow zest and not the bitter white pith.
Use the back of a spoon to make pretty swirls in the whipped-cream topping. Garnish each serving with a small fresh mint leaf and a whole toasted hazelnut.