Add one and a half ounces of butter to pan when foaming add onion fry for two to three minutes.

Add mushrooms peppers and cook for further two minutes.

Add puree, dijon and paprika cook for further one minute.

Add beef stock and bring to the boil then reduce and simmer for three to four minutes.

Season sirloin with salt and pepper then add remaining butter to separate pan, when foaming add meat and cook for two to three minutes making sure all sides are browned.

next you add your brandy( I recommend to remove from heat to do this) place back on heat and cook for a further few minutes checking not to overcook your meat.

Add sour cream to onion and mushroom mixture mix well.

Then add the meat to the veg mixture and cook for a further minute add parsley and allow to stand for a minute.