I'm a vegetarian and many people think that only animal products are source of protein, but there are many sources of protein... here are some of them that you can incorporate to your diet:
* Cereals and grains - wheat, rye, corn
* Leafy green vegetables, including spinach
* Legumes - beans, lentils, peas, peanuts
* Nuts - almonds, walnuts, cashews...
* Seeds - sesame, sunflower...
* Soy products - tofu, tempeh, soy milk...
* Vegetables - Brussel sprouts, potatoes, etc.
See? plenty protein sources
you just need around 50gms of protein per day. We consume much more protein than is needed.