1. Preheat your oven to 180 degrees Celsius. 2. Place the vegetables on a tray and drizzle with oil, garlic salt and roast for 15-20 minutes until golden. 3. Add a generous layer of pesto mayo to your toasted buns, layer the vegetables, sundried tomatoes, tomatoes , sprinkle generously with everything bagel seasoning. 4. Add red onion, add the torn mozzarella and fresh herbs and add more mayonnaise and the part of the toasted bun.