I was wondering if anyone has any ideas for protein in vegan smoothies that is NOT a protein powder? I stopped using protein powders a while ago when there were reports of vegan protein powders having high levels of heavy metals found in them, so I'd rather use real food. My thoughts so far are soy milk, tofu, or peanut butter. Or maybe lentils, if I could hide their taste? Does anyone have any other ideas/ advice? Thank you!