BBQ Seitan, Zucchini, and Potatoes

Seitan is a vegetarian 'wheat meat' which is really fun to say.
You can’t have bulgar wheat on Passover, so my wife made taboulleh with quinoa! It’s simple. Quinoa, fresh herbs (mint, dill, and parsley), tomatoes, the juice of two lemons, some salt, and olive oil. You can use cucumbers too, Persian…