Mickey, if you are still having difficulty finding Elizab's recommendation, try looking for Quaker Oats brand in supermarkets. They also make a steel cut oatmeal. You'll need to cook steel cut with a bit more water, and for a bit longer, but you'll figure out the texture of oatmeal you want. Buy the smallest size to see if it works for you. Don't buy the instant packages that you pop into the microwave. Those are highly processed and full of sugar. Steel cut or long cooking oatmeal is better.
I eat beets (peeled and cooked). I also eat steamed spinach. I avoid raw vegetables. Maybe you could try canned pumpkin? Add some nutmeg or cinnamon to the pumpkin for flavour, add some olive oil to "lubricate" food toward the exit. Look for foods that are soluble fiber, instead of insoluble fiber. Cooked zucchini is what I ate right after takedown and it works for me. Soluble food fiber becomes a gel-like consistency in the gut and comes out smoothly. But insoluble fiber does not break down and it comes out looking pretty much the way it went in (peppers, celery, carrots, cruciferous vegetables like Brussels sprouts or cabbage) can sometimes remain hard, whole, and painful to push out.