Because it comes before night time, the period with the least activity, dinner is kept light on this diet. Nevertheless, it's important to maintain the starter/main/dessert structure in order to fill you up, even with low-calorie foods, and to provide your body with a balanced diet.
-1 starter, preferably veg-based (soup, for example)
-1 main with plenty of protein (50 - 100g) such as a slice of ham or an egg, plus vegetables
-1 dairy product (fromage frais, yogurt, etc).
-1 piece of fruit either raw or puréed, in a mousse, baked in foil, etc.