– 1 tbsp olive oil – 1 onion, diced – 3 tsp minced garlic – 1/2 inch piece of ginger, peeled and grated – 1 green chile, minced – 1 pound boneless lamb shoulder, cut into 1 inch cubes – Salt – Pepper – 1 tbsp dijon mustard – 3 tbsp red wine vinegar – 1/2 cup tomato sauce – 1 tbsp cumin – 1 tbsp ground coriander – 1 tbsp paprika – 1 tsp turmeric – 1/2 tsp cayenne pepper – 1 tsp cinnamon – 1 cup beef stock – 1 medium sized potatoes, diced into 1-inch cubes – 1 bay leaf