...first...you'll need to make some VEGAN PÂTE À CHOUX...and have that ready and warm...
like the one here...I like it a lot...it has little grooves at the end to fit over the edge of the bowl or pot for stability...
pâte à choux
None really for this recipe...but you'll need the cream, egg and butter substitutes for the pâte à choux
Recipe here: Mastering the Art of French Cooking