The recipe title in the book is A Lunch of Baked Tomatoes, but we had these as a side dish with baked Porkinson's Sage and Onion Sausages, (simply the best quality supermarket sausage there is) oven-sauteed anya potatoes and broad beans. I would not normally think of using rosemary with tomatoes - basil, of course, thyme, yes, and tarragon is great too - but the finely chopped fresh rosemary worked really well. The grated parmesan is added at the end of baking, so it melts and toasts into a savoury crust with the garlic and rosemary. Very nice! I am afraid there isn't an online recipe, but I'm sure you get the picture from the description and - well - the picture!