Step 1

Set the Instant Pot to the saute function.

Step 2

Add a few tablespoons of oil and add the beef in batches. Brown well on all sides then remove and set aside.

Step 3

Add the onions, carrots and celery. Saute for 5 minutes then add the garlic, herbs and tomato paste. Cook for 1-2 minutes.

Step 4

Add the beef, stock, Worcestershire sauce and Guinness. Close the lid and move the valve to "sealing". Cook on the meat setting for 30 minutes.

Step 5

After 30 minutes, quick release the pressure and add the potatoes. Seal the lid again and cook on high pressure for 10 minutes.

Step 6

Allow the pressure to release then set to the saute function. Allow the stew to simmer then stir in the flour and water mixture. Allow to simmer for 5 minutes until the stew has thickened. Season to taste and serve.