Beans are best paired with cereals. Because the protein of beans and grains is not completely protein, they are both indispensable, so they are only complementary!
For example, soybeans and rice can be beaten together (sesame seeds can also be added), and it is the same for rice to be replaced by corn. Soybeans can be replaced with black beans, mung beans and red beans. It's okay to mix a few more. You can also add coix seed, cereal, buckwheat ... In short, you can mix all kinds of miscellaneous grains that can be bought in the supermarket.
It's best not to put walnuts, because the walnut skin is not easy to go, it's a bit astringent ~