Zucchini, cut into long strings on a mandolin, is actually not too bad with spaghetti sauce and cheese. Have to be careful not to overcook it. It's handy for when the OG has to be extra careful of carbohydrates. Another way I like zucchini is shredded, mixed in pancake batter and fried.
But vegetable marrow is special from my childhood. Grated, cooked in milk with a light roux and dill, add a splash of vinegar and a dollop of sour cream; serve with crisp, fresh fried potato rings.