Peel and chop the onion. In a skillet over a medium heat, cook (cook for 5 minutes) onion, TVP.
Add cooked rice, mushrooms, vegan oyster sauce, soy sauce, nutritional yeast, dried thyme, salt and pepper.
Preheat the oven 365F. Brush 6 sheets of filo with vegan butter (melted) and line them one by one into the cake pan in a rosette shape, letting the sheets hang over the sides of the pan.Spread filling in an even layer. Fold the overhanging pastry sheets over the top to enclose the filling.