Steak Diane and Pomme Frites

Ingredients

• 2 tbsp Dijon Mustard
• 1 tbsp Tomato Paste
• 2 tbsp Worcestershire Sauce
• 4 6-oz. Beef Tenderloin steaks
• Fish sauce, for brushing
• Freshly ground Black Pepper, to taste
• Grapeseed oil (as needed)
• 4 tbsp Unsalted Butter
• ¼ cup Shallots
• 2 tbsp Brandy
• ¼ cup Beef or Veal stock
• ¼ cup Chopped Chives
• Freshly squeezed Lemon Juice (to taste)
• Salt (to taste)
• 4 Russet Potatoes
• Grapeseed Oil