Smoky mushroom burgers with roasted garlic mayo - Good Food Middle East

Ingredients

• 4 large flat mushrooms
• 1 tbsp olive oil, plus extra for frying
• 2 roasted red peppers (from a jar), finely chopped
• ½ small pack thyme, leaves picked and chopped
• 50g fresh breadcrumbs
• 1 tbsp sundried tomato paste
• 2 tsp smoked paprika
• 3 red onions, thinly sliced
• 1 tbsp golden caster sugar
• 1 tbsp sherry vinegar
• 3 garlic cloves, unpeeled
• 50g good-quality mayonnaise
• 4 crusty bread rolls (we used ciabatta)
• salad leaves
• 25g cheddar or Manchego, grated