Okay, in that case I would look into the vegan meat substitutes. They're typically relatively high in calories and would be an excellent addition to getting your calorie count over what you need.
Supplement that with some Pea protein, and also make sure to take creatine, as creatine will cause you to absorb a couple of pounds of water weight.
If you are exercising and the point is to add muscle, that extra water weight will raise your NEAT just a hair, a few calories a day, but if the goal is to put on muscle, a little bit of extra expenditure is not a bad thing.