Thanks all! I like the idea of adding some sesame seeds and flax seed to my oatmeal. I tried chia seeds a couple of times and wasn't crazy about the texture, maybe I need to try again with a smaller amount to start.
To the PP griping about 1200 calories - I'm not aiming for 1200. 1400-1500 is about right for what I need.
Lentils are also a great idea. I love lentils, but the rest of my family doesn't, so I'm not in the habit of including them in dinners that we all eat together. I should make a batch on the weekend and use them for my own lunch.
And finally, I appreciate the idea that maybe I'm overthinking this

. I will look for small ways to increase fiber, but not stress over it.
Thanks again, DCUM!