You haven't mentioned fish, which should be low in fiber, and oil, and easy to digest.
There are lots of soy products as dairy or protein substitutes. The only ones I use are tofu and Kirkland soy beverage, which tastes like slightly sweetened skim milk. I avoid almond milk because a huge amount of water is used in production..
Are eggs OK? Certainly egg whites, angel food cake, lemon merangue or banana based pie? How about white bread with mayo and tuna? Sticky rice? Pearl barley? Tomato soup... squid... mussels...