Hi there,

I find this site amazingly useful when I have a glut of vegetables, here's the marrow page. A lot of the recipes are vegetarian. I have tried theMarrow & Parsely Cream Crumble & it was delicious. 

http://www.allotment.org.uk/recipe/category/vegeta.....ow-recipe/

I love young marrows, sliced very thinly as part of a Japanese Vegetable Tempura, with a dipping sauce. You need to make an authentic tempura batter though, otherwise it won't come out crispy enough. 

I am a huge fan of Japanese food & have prepared it for years. This site has so many recipes, advice & information on it for the preparation & presentation of their dishes, many of which are vegetarian. Here's the Tempura page.

http://japanesefood.about.com/od/tempura/a/cooking.....empura.htm

Happy cooking !