Ingredients • 2 tbsp salted butter, divided • 225 g/8 oz button mushrooms, sliced • 1 onion, thinly sliced • 450 g/1 lb sirloin steak, …
Ingredients • 2 tbsp salted butter, divided • 225 g/8 oz button mushrooms, sliced • 1 onion, thinly sliced • 450 g/1 lb sirloin steak, …
