Slow down mom!, You are doing great. The protein scare about vegetarianism is a crock. Americans get far too much protein even in low meat diets. What you want to focus on is fruits and veggies, whole grains and low fat dairy, the occasional nut is perfect. Too much soy is not good , you are right, but thats true with everything. Beans are powerhouses of protein, if your kids like beans i say more power to them, but you need not frett on reaching the protein quota every day, they are probably getting more than enough. What quota does need to be reached however is the vegetable one, introduce as many greens, in as many ways as possible. this task is much harder. I have been vegetarian for almost 20 years also, and so are my children. My oldest went through a phase where she tried meat and then upon discovering what it really was she never touched it again, she gets teased about it, but it doesnt matter to her. Please dont worry about trying to introduce meat to your daughter over some fear she might not be getting enough protein. It is 99.9% likely that she is.
The concern over soy is based on the fact that it turns to hormones to estrogen within the body, it is actually not the worst for females. Fermented soy (miso) does not do this, and actually is the only thing on earth than has proven it reverses radiation damage(just a little fact), but when we compare soy to the hormones transferred into the body by meat products the difference is phenomenal , not to mention the antibiotics you get with it also.
The diet of meat comes with economic, ethical, environmental and health implications and facts that far outweigh the scare of soy, or the idea of not enough protein.
You have been doing great, keep on truckin'
some fun foods you might try with the kiddos, Braggs liquid aminos, quinoa, flax crackers, jeruselum artichoke pasta, hummous, agave nectar, shiritake noodles, miso paste, edamame, portabello burgers, lentils, tahini, greek yogurt, almond milk, rice milk, vegenaise.......i could go on forever