Preheat your oven according to pastry instructions. Remember to thaw your dough, usually 1 hour before using, but check the instructions on your package.
Heat olive oil in the pan on medium heat and sautée onions, garlic and mushrooms for about 5 minutes.
Add in the dried herbs, onion soup mix (if using) and a few cracks of freshly ground black pepper and cook for 1 minute. Pour in white wine if using and let it simmer for about 5 minutes until your mixture is cooked through and liquid is almost fully absorbed. Toss in your spinach and cook until wilted, but still green.
Transfer this mixture to a food processor and add nutritional yeast, vital wheat gluten, beans and fresh parsley. Pulse until combined. Add more salt and pepper to taste if you desire. Let cool on the counter for about 30 minutes.
Roll out your dough on a floured surface and cut into rectangles roughly 10x20cm. Form a long sausage on top of the dough. Roll the pastry tightly over the filling. Cut into pieces that are about 2 inches wide.
Place your rolls on a parchment lined baking sheet and brush each piece with melted vegan butter. Bake according to the pastry package instructions and your pastry is golden and flaky (mine took roughly 20 minutes).
Serve alone or with a dipping sauce. I keep it simple with ketchup, hot sauce or dijon mustard.