Slice each roll open and spread the inside of each half with the kale pesto. Assemble the toppings on the base of each roll by starting with a slice of vegan cheese. Add 2 mushrooms, 2 slices of the Braai-Style Sausages and a few slices of tomato to each sandwich. Top with the other half of the bun.
Cook the sandwiches over medium heat coals on the braai/barbeque for 10-12 minutes, turning regularly until golden, crisp and lightly charred (use a sandwich grid if you have one to make turning easier). Serve each sandwich with chili oil for dipping or drizzling.
TIP: The sandwiches can also be cooked in a griddle pan over medium heat for 4-5 minutes on each side until golden and crisp. Turn the sandwiches regularly to avoid over-charring. The sandwiches can also be cooked in a Panini press, if preferred.