i eat an apple with a teaspoon of pistachio butter (sometimes two) for breakfast. If I am still hungry, I eat 150g of blueberries with some vegan organic protei

i eat an apple with a teaspoon of pistachio butter (sometimes two) for breakfast. If I am still hungry, I eat 150g of blueberries with some vegan organic protein powder (2 teaspoons) and cottage cheese. How can I tell if oatmeal would have more fiber? I also eat basically an entire romaine earth at lunch and cooked veggies at dinner. Fiber is definitely the only things that makes me full without making me fat.