Beef Straganoff - SuperValu

Ingredients

• 400 ml Beef Stock
• 30 g Butter
• 300 g Chestnut Mushrooms
• 200 ml Creme Fraiche
• 1 tbsp Dijon Mustard
• 1 pinch Flat Leaf Parsley
• 4 small Gherkins
• 1 tbsp Olive Oil
• 1 medium Onion
• 4 portion Rice or pasta to serve
• 1 tbsp Salt and Pepper
• 500 g Striploin Steak
• 2 tbsp flour