Put the oil in a deep frying pan and fry the beef in small batches for 3 – 4 minutes until browned turning occasionally.
With a slotted spoon put the cooked beef in the crock pot.
Fry the bacon slices in the remaining oil for a few minutes until golden then add to the crock pot with a slotted spoon.
Add the onions, leeks, and garlic and cook for a further 3 minutes stirring all the time.
Add the beef back to the pan, stir in the flour, and cook for 1 minute.
Add the red wine, port, and bouquet garni and bring to a boil.
Dissolve one Knorr Rich Beef Stock Pot into 375 ml of boiling water and then add to the pan.
Transfer everything to the slow cooker and cook on High for 6 – 8 hrs or Low for 8 – 10 hrs.
Ten minutes before serving make the garnish by frying the remaining bacon strips until lightly browned, strain them off, and add the wild mushrooms to the pan. They only need a minute or two.
Remove the pot from the slow cooker, give everything a good stir, and then add the garnish.
Serve with mashed potatoes and a medley of vegetables.