handful mixed salad leaves or Little Gem lettuce
4 Portobello mushrooms
1 beef tomato, sliced
2 garlic cloves, crushed
sweet potato fries (optional)
2 tbsp barbecue sauce
1½ tbsp miso paste
1½ tbsp olive oil
1 tsp sweet smoked paprika
1 tsp sesame seeds
2 tbsp vegetable oil
vegetable oil, for brushing
2 burger buns, split and toasted