Preheat the oven to 220°C / Fan 200°C / Gas 7. Prepare Quorn Ultimate Burgers according to package directions, along with onion rings.
To make the roasted mushrooms, toss the mushrooms with the oil, thyme, salt and pepper. Arrange in single layer on parchment paper-lined baking tray. Bake in the same oven as the onion rings for 15 minutes or until golden brown and tender.
To make the vegan aioli, mix together the vegan mayonnaise, mustard oil, honey, garlic, salt, pepper and smoked paprika until blended.
Serve the burgers in buns with the rocket, tomato, guacamole, aioli, mushrooms and onions rings.
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* 'Take a step in the right direction' relates to products such as Quorn Mince, which are among the 60% of Quorn volume sold in the UK that have been certified with the Carbon Reduction Footprint by the Carbon Trust for the full lifecycle of the product. This not only means we know the carbon footprint of the product, but also that we have committed to reducing it over time. For further details of our carbon emissions by product view the full report here. The Quorn “Step” visual is a trademark of Quorn Foods Ltd.