This vegan sausage roll recipe is made using an alternative sausage roll filling made by blending together fried onion, garlic and mushrooms in a food processor along with white beans, walnuts, herbs for fragrance, and nutritional yeast and miso for umami flavour. Incidentally, this vegan sausage meat can be shaped into patties to make gluten-free vegan sausages (or breakfast sausages!) which are amazing made into a sandwich using these Gluten-Free Vegan Bagels.