Transfer the squeezed beets, cooked rice, and sautéed onions to the bowl with the beans. Sprinkle the olive oil, brown mustard, smoked paprika, cumin, coriander and thyme over the top of the mixture. Mix all the ingredients until combined. Taste the mixture and add salt, pepper, or any additional spices or flavorings to taste. Finally, add the oatmeal flour and mix.