Hi, Artie 🙂 Have you ever tried quinoa? It’s a complete protein all by itself, 16 g in a cup naturally containing all the amino acids. I’d say try to get in a serving of quinoa daily. Also, plain yogurt is allowed (you could sweeten it with stevia if you can’t choke it down plain) and it has 9-10g of protein per cup, as well. If you round those 2 out with high protein nuts and seeds everyday, you should be able to get a decent amount of protein in.
If you concern is more from a hunger perspective, it’s probably going to take a crazy amount of veggies to fill you up. Have you tried adding avocado to salads? I usually add avocado and/or nuts and seeds to bulk up a salad. What are you used to eating for dinner as a vegetarian? Is the elimination of soy products making it difficult? You can make a reasonably tastey stirfry with TONS of veggies, garlic, sesame oil, sesame seeds, and salt (maybe ginger, too?) that you could add almonds to and serve over a little brown rice with a side salad. I get stuffed when I really use a ton of vegetables.
Lastly, maybe try to save your yogurt or quinoa for the hardest time of day hunger-wise. If you’re always *starving* at 4pm, for instance, just plan for a 3:30 yogurt snack or something like that.
Hope it helps! Best wishes!