Mumbai roadside hot lamb sandwich recipe

Ingredients

• 2 tbsp vegetable oil
• 0.5 red onion, finely chopped
• 200 g minced (ground) lamb (or see introduction above)
• 3 large garlic cloves, finely chopped or grated
• 8 g (1⁄2 tbsp) finely grated root ginger (peeled weight)
• 0.5 or 1 Indian green finger chilli (chile), finely chopped (optional)
• 1 small tomato, chopped
• 0.8 tsp ground cumin
• 0.5 tsp garam masala (fresh if possible)
• 1 small egg
• 1 handful chopped coriander leaves