Butterflied Pork Steaks with Tangy Gravy - Ziggys

Ingredients

• 4 Butterflied pork loin steaks
• 2 tbsp butter
• 1 tbsp olive oil
• 1/2 cup onion, diced
• 1 1/2 tsp plain flour
• 1 1/2 tsp Dijon mustard
• 3/4 cup beef stock
• 1 heaped tbsp gherkins, diced
• 2 tsp lemon juice
• Sea salt flakes and freshly ground black pepper, to taste