Adding a greek yogurt or 1/2 cup of cottage cheese will easily boost your protein.  One yogurt can have anywhere from 9-14grams  of protein(about 100 calories).  Low fat cheese sticks can give you 10-12 grams of protein for two (about 100 calories for 2) and these are easy things for your mom to pick up for you.

As far as I've heard from the few dietitians that work with my surgeon, protein shakes are pretty much essential in the beginning stages of post-op! I just had my VSG surgery on Monday, and I will be able to start drinking protein shakes on Friday, so 3 full days after surgery. (These 3 days have been clear liquids, the next stage-full liquids- is when I can start the shakes.)

However, I don't want to give you any advice that might not hold true for YOUR particular surgeon. Please ask your dietitian directly!

If the case is you are encouraged to explore protein shakes, I highly recommend the pre-mixed Premier Protein shakes that you can find at Costco. 30g of protein in one shake, plus a ton of vitamins as well. And the chocolate tastes like a Yoohoo and the strawberry cream tastes like strawberry milk! Best shakes I've found so far. Good luck with your journey!

green beans don't have protein and Lean Cuisines are too carby and really just junk food with little protein.

why not cook real steak,chicken fish etc and get your protein from 2-3 servings of that ?

why are you having trouble eating that much protein pre op?

I had my surgery on Nov. 23, 2015, and at about 1 1/2 weeks out, I started to have nausea which kept me from eating, very much like you. It was the worst feeling I'd ever felt, and I was really discouraged and full of regret for having had the surgery. After several days of suffering, I called my doctor who had prescribed compazine, an anti-nausea drug, before I'd even had my surgery (apparently, nausea is quite common after bariatric surgery). The compazine was a life-saver. I was finally able to eat pureed foods, then soft foods. About 10 days later, I stopped taking the compazine to see how I felt, and I felt fine - no nausea. I was lucky. The nurse told me that some patients can feel nausea for several months. I've had nausea a couple of times since then, but those times were when I'd eaten something I shouldn't have eaten - like fried foods or sugary foods. 

Many of the people in this group have already had the surgery and are experienced in what works and what doesn't. You're right, everyone is NOT the same, but the foods you're eating are, according to my nutritionist, doctor, nurse, and every bariatric eating website I've visited (ALOT), on the restricted list at this point in your recovery period. The meat, cheese, and veggies are good choices. Maybe try the taco without the shell? And reduced sugar orange juice? I know for me, what to eat and how much is a learning process. Every day is a learning experience. Just know that it does get better with time. 

While I understand your frustration, please know people aren't trying to judge you. Some use the tough love approach, some use a more gentle approach. But know that however the message is delivered, it's meant to help you. I hope you feel better soon.