No exact number has been put on soy, but some studies have said 24 grams of soy protein per day. Fiber is easier to determine and easier to get. Sometimes, they have soluble fiber, which is even better for you. Nutrition facts label for Fiber One cereal For soy, you need to look at soy products and then look at the protein content. It's harder to find foods rich in soy than fiber.
Good sources are soy nuts, tofu, soy beans, soy milk, and soy burgers.
Avoid soy supplements. The banana will give you potassium, and the fruits will add about 4 g of fiber. Stir it in well, and every spoonful will give you fruit, and it helps the somewhat bland cereal go down well. With skim milk, you've got about 395 calories, and you have 30 g of fiber and only 2 g of fat. If using blueberries, try adding Soy milk.