Grilled Indian Lamb Skewers - Icelandic Lamb

Ingredients

• 200 g lamb medallions/small pieces of lamb
• 1 red onion, sliced into wedges
• 1 tbsp. garam masala
• 1 tbsp. ground cummin
• 1 tbsp. ground coriander
• ½ tsp. chilli powder
• 2 tbsp. olive oil
• 1 cm fresh ginger, grated
• 2 garlic cloves, grated
• 100 g pearl barley
• 500 ml water
• 1 shallott
• 100 g mushrooms
• 3 tbsp. olive oil
• 1 cucumber, seeded and grated
• 200 ml greek yogurt
• 2 tbsp. chopped fresh mint
• 1 tsp. cground cummin
• pinch of cayenne pepper