1 Little Gem lettuce, leaves separated
8 large portobello mushrooms, each around 9cm/3½in wide
1 tsp garlic powder
1 tsp lemon juice
2 tsp onion powder
12 fresh sage leaves (around 10g/â…“oz), finely shredded
2 large ripe vine tomatoes, sliced
2 tsp Dijon mustard
100²µ/3½´Ç³ú mayonnaise
fine sea salt and freshly ground black pepper
2 tbsp caster sugar
2 tsp ground ginger
1 tbsp extra virgin olive oil
1 tbsp sesame seeds
2 tbsp light soy sauce
1 tbsp sunflower oil
500g/1lb 2oz pork mince (around 12% fat)