For the full details on making the lemon syrup and soda please refer to the original Italian lemon soda recipe. Technically ...

The best lemon lime soda is bright ... sugar rather than high fructose corn syrup, which a lot of soda heads seem to be into.

Divide the berries among individual gratin dishes along with some of the syrup, or spoon into one larger gratin dish. Fold the whipped cream into the lemon-lime curd, and then pour over the berries.

Add in the tangerine juice, lemon juice, rosemary simple syrup, and lemon-lime soda. If you prefer your drink to be a little less sweet, you can leave out the lemon-lime soda. Top off with club soda.