Chopped fresh flat-leaf parsley, to serve
Cooked fettuccine, to serve
1/4 cup creme fraiche
3 tsp. dijon mustard
2 tbsp. tomato paste
3/4 cup beef stock
1/2 cup dry white wine
400 g button mushrooms, sliced
1/2 tsp. sweet paprika
2 garlic cloves, finely chopped
1 large brown onion, halved, thinly sliced
1 1/2 tbsp. olive oil
40 g butter, chopped
700 g beef rump steak, trimmed, thinly sliced
2 tbsp. plain flour