Beef Stroganoff

Why I Love This Recipe
I'd never had beef strog before, but after seeing the tantalizing photos from a Jamie Oliver recipe, I just had to give it a try!
Ingredients You'll Need
Olive oil
50g unsalted butter
500g beef fillet steak, cut into thin strips
1 small onion, finely diced
1 garlic clove, finely chopped
300g mushrooms, thickly sliced*
125ml whiskey
3 gherkins, finely chopped
Pinch of smoked paprika
300ml light sour cream
*Jamie suggests using oyster, chestnut or chanterelle mushrooms. I just used field mushrooms as that was all I had.
Directions
Heat a wide, heavy-based frypan over medium-high heat, then add a splash of olive oil and half the butter.
Season the beef well with salt and pepper, then working in small batches, briskly fry the beef for 1-2 minutes to brown all over. Transfer to a plate and cover to keep warm.
Melt the remaining butter in the pan, reduce the head to medium-low and cook onion and garlic gently for 5-7 minutes till soft. Add mushrooms and cook for 1 minute. Add whiskey with cooking juices from the rested beef.
Bring to the boil and cook for 2-3 minutes. Add the gherkins, paprika and sour cream, and reduce the sauce slightly over medium-high heat for 7 minutes, then stir in beef and warm for 1 minute. Season, sprinkle with chopped parsley, and serve.
Pasta or rice to serve.