Fillet steak with Seafood Mac 'n' Cheese

Ingredients

• 2 x 200g fillet beef steaks
• 1 tbsp vegetable oil
• 50g butter
• 1 beef stock cube
• 1 tsp salt
• Black pepper
• 100g butter
• 25g plain flour
• 300ml milk
• 300ml double cream
• 2 bay leaves
• ½ an onion
• 3 cloves
• 1 small bunch parsley, chopped
• 300g grated cheddar cheese
• Dash of Henderson’s relish
• 400g macaroni
• 100g white crab meat
• 100g brown shrimp
• 2 extra large prawns peeled head on