Steak diane with chive mash

Name: Steak diane with chive mash
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: European, British
Ingredients: 700g Desiree potatoes, peeled, chopped (see note); Olive oil spray; 8 beef eye fillet steaks; 2 garlic cloves, crushed; 22.20 gm no-added-salt tomato paste; 125ml (1/2 cup) beef stock; 36.60 gm Worcestershire sauce; 20.00 ml cooking cream; 40.00 ml chopped fresh continental parsley; 80ml (1/3 cup) low-fat milk, warmed; 40.00 ml chopped fresh chives; Pinch of white pepper; Broccolini, halved crossways, steamed; Chopped fresh continental parsley, extra, to serve