Marshmallows
This may come as a shock to some of you and may not come a shock to others. Marshmallows are sweet, and who puts meat in a sweet treat? Although marshmallows are chewy, which gives people an excuse to put meat in. Most marshmallows aren't vegetarian and vegetarian ones are very rare. Although you can order them online from the following website:
http://www.freedommallows.com/
which is Vegetarian Society approved.
Jelly
If you haven't already worked out why jelly is called jelly here's why. It's because it used to always have gelatin in which is an animal based product and therefore not vegetarian. Luckily, though, nowadays there are vegetarian jellies such as Hartley's Quickset sachets.
Pesto
As I have mentioned earlier on in my blog, sadly, some cheeses aren't vegetarian and since pesto is often used as a garnish for pasta it sometimes has cheeses in, such as Grana Padano and parmesan, which aren't vegetarian. Sadly, there aren't many vegetarian pestos, since most companies think it tastes better with non-vegetarian cheese in, although you can make your own following this recipe at http://glutenfreegoddess.blogspot.co.uk/2008/02/winter-pesto.html or buy zest vegan basil pesto which are both vegetarian.
Updated June 2015:
Recently the well know company Sacla have started creating their own vegetarian pesto. This is much easier to find than 'zest vegan pesto' and it is stocked in many supermarkets.
