Isn't an oversized zucchini (or courgette) a perfectly ordinary MARROW???
You Know - BIG green thing full of water!
Recipe = You cut it in half lengthwise - scrape ALL the contents out (bung them in the bin) then fill the shell with cholesterol laden minced beef fried in butter and herbs! Ideal for the meat eater who wants to try vegetarianism (without all them GREEN things)???
Quack!
GtD.