Udon noodles are made from wheat flour, salt, and water, making them a great choice for the starch in this meal. We are adding a ton of veggies which add lots of nutrients (and not a lot of calories) to this meal as well. If you would like to add plant-based protein, you’re definitely welcome to. I think soy curls, seitan, tofu, or a store-bought meat replacement are all great ideas. My panko tofu, crispy tofu, or puffed tofu would all make tasty additions, for example.