Protein is one of those things that people seem to think is difficult to get in a vegetarian diet however protein is found in A LOT of foods and it is almost impossible not to eat enough protein (assuming that you are eating a sufficient amount of food). Modern western diets actually contain more protein than in actually needed. Enough if the lecture, I should really answer the question
Good sources of protein in a veggie diet include:
Milk and Milk products such as cheese and yoghurt
eggs
Soya products
Nuts
Seeds
Beans
Pulses - Lentils, kidney beans etc
Grains - Wheat, barley, rice etc.
I heard years ago, and I don't know how true it is, that baked beans on wholemeal toast has the same amount of protein weight for weight as steak. Maybe a lot of old cobblers but that is one example beans on toast is a quick and easy protein rich snack/meal for a little one, although try to avoid high salt and sugar ones

Peanut butter or cheese sandwiches is another good one, shall I carry on. Cereals with milk on........ rice with peas........lentil soup yum yum a staple in this house yummy and really easy to make especially if you have a pressure cooker.
I used to think that meat eaters wouldn't like the sort of stuff I grew up with lentil soup and that kind of thing but I haven't yet met anyone who doesn't like my lentil soup
I have weaned both of mine using mainly the recipes and advice from two books:
Baby and Child Vegetarian Recipes by Carol Timperley and
Mother, Baby + Toddler Book by Rose Elliot
I now appear to be waffling I will shut up