I buy the big tubs of Greek yogurt, whatever brand I can find in full fat that particular trip. I then add my own goodies to it- either sweet or savory, whatever I'm in the mood for. I like lemon curd the best for my sweet add, and making it into tzatziki for my savory. I also use it plain in place of sour cream, same flavor and consistency, more protein. So, I'll make dips with it, or just slather it on food before eating.
Texmex, and Mexican are by far, some of my favorites as a postop. They have great flavor, and I can smother them in guac, greek yogurt (or sour cream if we are out), cheese and salsa and even the driest or more difficult cuts of meat will go down like butter with all that fat and saucy goodness. Refried beans with cheese and greek yogurt were one of my "go-to" foods early out, and they are still yummy. I get fajitas a LOT, I'll usually eat one actually rolled up in a tortilla, and then just pick at the rest with a fork. Same with burritos and such, I just take a few bites of the shell, so I can get to the yummy insides, then I just deconstruct and scoop out all the good stuff. Taco salads are one of my faves- light on the lettuce, and double meat and cheese. Chipotle is awesome as I can order a burrito bowl, hold the rice, small scoop of black beans, double meat, double cheese, guac, sour cream, pico and YUM! One of those bad boys has about 70g of protein for the whole thing (I can now eat about 3/4 of one in one sitting, sometimes the whole thing). There is an AWESOME Salvadorean place near me and I always get the same thing- its a steak, 2 eggs, a huge hunk of Salvadorean cheese, refried beans w/cheese, and some sauteed veggies. Droooool. I could go on and on. I can ALWAYS find something high fat and high protein and make it work for me with Texmex or Mexican.
As for the pee deal, I also pee less postop. YAY!