Frittata is mostly egg so no you can't do that...

Fritters yes you can, you would need some "No Egg" or "Egg like" binder, some flour, maybe creamed corn (as it also acts as a binder) and then whatever you would like to add ie tuna, potato etc.

I'm sure you already use "No Egg" or "Egg like" but basically it is a powder that you can use as an egg substitute, I've used it many times for vegans.