Lamb Rogan Josh Samosas

Ingredients

• 2 tbsp vegetable oil
• 2 red onions, halved, thinly sliced
• 6 green cardamom pods
• 1 cinnamon stick
• 6 garlic cloves, crushed
• 4cm-piece ginger, peeled, finely grated
• 3 tsp sweet paprika
• 1 tbsp garam masala
• 1/2 tsp chilli powder (or to taste)
• 800g lamb shoulder, trimmed, cut into 4cm pieces
• 1 tbsp cornflour mixed with 1 tbsp water
• 6 sheets frozen puff pastry, just thawed
• 1 egg, lightly whisked
• Lime wedges, to serve
• Herb raita
• 130g (1/2 cup) natural yoghurt
• 1/4 cup chopped fresh coriander leaves, plus extra sprigs, to serve
• 1/4 cup chopped fresh mint leaves, plus extra sprigs, to serve
• 2 tbsp fresh lime juice