Simple in the extreme. Muchly Yum. Good as a satisfying side or a light supper over rice.
Peel, de-seed and chop a large marrow into nice big chunks and place in roasting dish. Scissors cut a small bundle of fresh rosemary over it. Mix through a punnet of halved baby plum tomatoes (other toms will do). Rub a couple of tablespoons of olive oil and a little seasalt into the mixture and roast at 200C for at least half an hour.