I've been cleared for the Vertical Sleeve Gastrectomy and am on day 3 of the pre-op liquid diet. It ain't so bad really. The reason I'm able to say that is because 
I've adjusted the diet to fit my needs (that's how I roll, behbeh). I knew I wasn't going to be very successful if I stuck to the 3 protein shakes, I small meal under 300 calories, and 1 tiny snack under 200 calories. I feared for the life of my sweet chihuahua and her tasty, wee appetizer-like legs.
The way I saw it was if I stuck to the whole foods under 500 calories and the rest in shakes, I'd be okay. Thankfully my doc was peachy with the way I wanted to mix it up (pft ft ft, get it? "Mix" it up... [I'm on a drastically reduced meal plan, we ain't gonna strike gold here folks]). So, might I present to you...
Fat Brown Chick's Sleeve Pre-Op Liquid Diet for Weenies
  | Breakfast: | 
  Calories |  
  Protein | 
  | 1/2 Cup Egg Whites | 
  63 |  
  13 | 
  | 1 Medium Bell Pepper (1/3 each of Red, Orange, Yellow) | 
  24 |  
  1 | 
  | 1/4 Cup Medium Onion | 
  12 |  
  0 | 
  | 1 Cup Spinach | 
  7 |  
  1 | 
  | 1/2 Protein Shake (OhYeah!) | 
  110 |  
  17.5 | 
  | Breakfast Subtotal | 
  216 |  
  32.5 | 
   | 
   |  
   | 
  | Snack: | 
   |  
   | 
  | 1/2 Protein Shake (OhYeah!) | 
  110 |  
  17.5 | 
   | 
   |  
   | 
  | Lunch: | 
   |  
   | 
  | 2 Cups Romaine Lettuce | 
  16 |  
  1 | 
  | 1.5 Oz Chicken Breast | 
  70 |  
  13 | 
  | .5 Oz Fat Free Crumbled Feta (from Trader Joe's) | 
  17.5 |  
  2.5 | 
  | 1/2 Medium Tomato | 
  11 |  
  .5 | 
  | 1/2 6" Cucumber w/o Skin | 
  9 |  
  0 | 
  | 1/2 5.5"/2 Oz Carrot (Shredded) | 
  10 |  
  0 | 
  | 1 Tablespoon Kraft Zesty Italian Dressing (Fat Free) | 
  7.5 |  
  0 | 
  | Lunch Subtotal | 
  141 |  
  17 | 
   | 
   |  
   | 
  | Snack: | 
   |  
   | 
  | 1 Protein Shake (Jay Robb's Egg White Protein) | 
  120 |  
  24 | 
   | 
   |  
   | 
  | Dinner: | 
   |  
   | 
  | See Lunch | 
  141 |  
  17 | 
  | 1/2 Protein Shake (OhYeah!) | 
  110 |  
  17.5 | 
  | Dinner Subtotal | 
  251 |  
  34.5 | 
   | 
   |  
   | 
  | Dessert/ Late Night Snack: | 
   |  
   | 
  | 1 Cup Pre-Packaged Red Grapefruit (Costco) | 
  110 |  
  1 | 
  | 1/2 Protein Shake (OhYeah!) | 
  110 |  
  17.5 | 
  | Total | 
  1058 |  
  144 | 
Since I'm lactose intolerant, I have to stick with lactose-free protein shakes. 
OhYeah! ready-to-drink shakes pack in 
35 grams of protein and are pretty decent tasting. They come in chocolate, vanilla creme, strawberries & creme, cookies & creme, and bananas & creme. What I like about these is that I feel like I'm being decadent when I drink them. They remind me of having the naughty full-fat chocolate milk you got when your were a kid.
The other lactose-free protein powder I have is 
Jay Robb Egg White Protein. It comes in chocolate, strawberry, vanilla, and unflavored and they're all 
24 grams of protein. I haven't tried the unflavored one, but the first three are pretty good. They're kinda expensive, but I'm scared of having some weird milk allergy, so I started off with these. 
If you're on your way to a bariatric surgery, you can get the sample kit through the Jay Robb website. But really, just head down to the 
Vitamin Shoppe and they have the packets there too.
A fit friend of mine turned me on to 
TrueNutrition.com. It's a cool site because 
you can choose your flavors and sweeteners in addition to your protein. They've got whey, egg, rice, beef, pea, and hemp protein (I'm sure there are others). I bought some of the beef protein to add to my chicken and beef broth. I was hoping to make a kick-ass 
horchata protein shake with the vanilla rice w/splenda one that I got. No dice. Not. Good.
On a not-really related note, is it weird that 
I feel like these nutrition websites are judging me for not being healthy enough? Like they're being run by super fit, snobby muscle-heads who 
just know that my IP address is that of a fat person. Don't even get me started about walking into the Vitamin Shoppe...
  | 
| What're you doing here? Like, ohmygah... *hair flip* |