Brown your meat in hot oil and then add onion and brown them too.

Add ginger garlic paste and stir for a minute

Add guinness, water and stir in tomato paste, and cook for 30 mins.

Add diced potatoes, cover reduce heat and simmer for another 30 mins.

Add tomatoes and cook for 5 minutes or until tomatoes are cooked.

Add salt and pepper to taste and let it simmer again for 10 mins.

Switch off the flame and let your stew sit for 5 mins before serving.