That exclusions list looks like you can't eat anything. What can you eat? Eat a little more of whatever that is, and lift heavy. Bodies are pretty good at figuring out how to use what you eat.

Sounds like a standard vegan diet without potatoes and some fruits? What's the issue? Just eat a rich protein vegan diet. Soy, beans, lentils, vegetables, rice, ...

What's the starting point and end goal? Because "bulk up a bit" can be eat more calories and exercise for a month, and then lose it, or a radical long term change.

Bulk up by how much. Are you underweight? Do you just want to tone your muscles? Whats going on here.

so by starch you mean carbs. like is fiber fine. also zero in those other things because most whole non animal foods are going to have some fo almost everything.

BEANS

There are lots of great infused cooking oils. Maybe you can find one infused with !

salted nut mix

When you say meat do you mean any animal flesh product?

Soybeans mixed with boiled starch-free rice swimming in glucose gel. That is protein and the most basic of sugars. The "starch-free" rice probably isn't 100% starch free, but it's close. If you can tolerate it, the carbs would be useful.

You probably would need a few dozen multivitamin pills for dessert though. Crushing them up and adding it to the soy and sugar probably would taste kinda bad.

Still, I don't think that would be balanced enough to convince your body it wasn't starving so bulking up probably isn't going to come easy or safely.

You need protein with additional variety, and I think my concoction would probably push you over the edge into protein poisoning with a massive sugar imbalance to boot.

I started off lightly joking at first, but if you crank up the soy in your diet along with simple sugars, you can probably just add that to whatever else you can eat and be OK. Unless, of course, you have a soy allergy as well.

(Sounds like you have some serious gut issues and are incapable of breaking down most proteins and more complex sugars. I am not sure if the soy will help much or if you can get all the amino acids you need if there is a protein digestive issue going on.)