Cheese can become tricky. Some use animal rennet, others do not. Vegetarians eating cheese should check the label for words such as rennet, or enzymes, which are indications of animal by-products. Note that Kosher cheese is vegetarian. When it comes to goat cheese, brands made in Great Britain are usually vegetarian, while goat cheese produced in France tends not to be. When it comes to cheeses, your best bet is to read the label carefully.
Some vegetarians may eat fish (this cookbook does not contain fish recipes). However, many of the recipes in this Foolproof Vegetarian Cookbook do call for Worcestershire sauce, which contains anchovies. If you prefer, substitute tamari for Worcestershire sauce.
Other vegetarians lean toward a more vegan regime that rejects not only meat but fish and dairy, as well and opt for vegan substitutions. It is important to get all your proper nutrients as a vegetarian. Eat starches such as potatoes and pasta as one-third of your diet, preferably wholegrain. Beans and legumes provide protein, vitamins, and fiber. While sugar is permitted, it is a good idea to limit it.