Set the pot to saute and add the oil. When the oil is hot add the beef and brown.
Use a slotted spoon to remove the beef and set aside.
Add the bacon and onion and fry until the bacon is browned (add a little extra oil if necessary).
Add the beef back to the pot followed by the garlic, bayleaf and thyme. Season to taste.
Add the wine and bring to the boil. Thoroughly deglaze the pot.
Now add the stock, carrots, potatoes and mushrooms.
Stir together and put the lid on the pot. Set on high pressure for 30 minutes.
When the time is up, leave under pressure for another 15 minutes and then do a quick release if necessary.
Set the pot to saute. Add the cornflour to a small bowl and mix in around 5 tbsp of liquid from the pot. Mix back into the pot and bring back to the boil.
Allow the sauce to thicken (this should take around 4 minutes).
Serve and enjoy.