Steak with mushroom sauce recipe

Ingredients

• 4 tsp sunflower oil
• 1 onion, sliced
• 250g mushrooms, halved and sliced
• 2 tbsp cake flour
• 1 cup (250ml) low-fat or fat-free milk
• lemon juice and black pepper to taste
• 1 tsp Worcester sauce
• ½ tsp dried thyme
• 4 x 160g steak or chops, all fat removed
• ½ tsp salt