Summer steak subs - Good Food Middle East

Ingredients

• 2 sub rolls or mini baguettes
• 1 tbsp mayonnaise or horseradish sauce
• 1 tbsp vegetable oil
• 1 small onion, finely sliced
• 1 red pepper, deseeded and finely sliced
• 2 thin frying steaks
• 2 slices Gruyère cheese