Yeah, you have to eat more quantity-wise (but really, not that much more). Personally, I love eating, so I don't complain about it :) Eating many times during the day is healthier for your body anyways.

I make a vegan sandwich with 30g of protein and about 700 calories. Add a protein shake and a side of chickpeas and you're pushing 90g. It's shockingly easy (and healthy) to load up on vegan calories if that's your goal!