French Vegetarian Cooking: In a Nutshell (1999) by Marie-Pierre Moine is a really great cookbook.

It is very short and is very accessible for beginners to cooking French vegetarian food. There is great information about nutrition and the best vegetables to get, a section about herbs and spices, some advice about preparation and cooking tips and what essentials you need in your storecupboard. There is lots of great recipes including Green Salad With Walnuts, Potato And Watercress Soup, Provencale Soup, Tomato Tart, Potato Gratin, …

Get more information, and where to buy the book.