This can take so many alterations, I hesitate to mention all of them at risk of complicating a gloriously simple recipe. You could use napa cabbage in place of the brussels or kale. Some shredded rotisserie chicken or edamame beans or roasted tofu bits if you are looking to fill this out. My hope is that you take these recipes and trust yourself to add to your taste. Clearly we have an Asian flavor theme going here, add accordingly.