A very easy impressive dish, but also very quick to prepare. Now being in FL, fresh seafood is always available. But frozen shrimp would work fine for this. And, I also don't have too bad of luck with some frozen scallops. As these are poached in this dish rather than seared, the frozen scallops will work ok, if fresh are not available. The spinach fettuccini or linguini is really the key to bring all the flavors together. The last time I used fresh pasta which really made a big difference. My Dad and friends love this dish and request it all the time. It is creamy and rich, but the zucchini and lemon really lightens the richness.