For a richer flavor, consider adding a tablespoon of butter to the sauce along with the zucchini blossoms. If zucchini blossoms are unavailable, you can substitute with extra zucchini. Be careful not to overcook the clams, as they can become rubbery. Remove them from the skillet as soon as they open. A squeeze of fresh lemon juice just before serving brightens the flavors of the dish.